slove the equation 3/4x+3-2x=-1/4+1/2x+5

hey future ai users

3/4x+3-2x=-1/4+1/2x+5 [combine terms]
-5/4x+3=19/4+1/2x [subtract 1/2]
-7/4x+3=19/4 [subtract 3]
-7/4x=7/4 multiply [-4/7 ]
x=-1
you're welcome if you needed the help

anyways

Determine which equations have the same solution set as StartFraction 2 Over 3 EndFraction minus x plus StartFraction 1 Over 6 EndFraction equals 6 x. – x + = 6x by recognizing properties, rather than solving. Check all that apply.

4 – 6x + 1 = 36x
StartFraction 5 Over 6 EndFraction minus x equals 6 x – x = 6x
4 – x + 1 = 6x
StartFraction 5 Over 6 EndFraction plus x equals 6 x + x = 6x
5 = 30x
5 = 42x

11 answers

To determine which equations have the same solution set as the equation \(\frac{2}{3} - x + \frac{1}{6} = 6x\), we can manipulate the original equation by applying algebraic properties without solving explicitly.

First, let's simplify the original equation:

  1. Combine the terms on the left side: \[ \frac{2}{3} + \frac{1}{6} - x = 6x \] To combine \(\frac{2}{3}\) and \(\frac{1}{6}\), find a common denominator (which is 6): \[ \frac{4}{6} + \frac{1}{6} - x = 6x \quad \Rightarrow \quad \frac{5}{6} - x = 6x \]

Now we can analyze the options given and see if they can be transformed into an equivalent equation with the same solution set as \(\frac{5}{6} - x = 6x\).

Examining each equation:

  1. \(4 - 6x + 1 = 36x\)

    • Combine like terms: \(5 - 6x = 36x\)
    • Rearranging gives: \(5 = 42x\) (Same as option 7, which is equivalent).
  2. \(\frac{5}{6} - x = 6x - x\)

    • Simplifies to: \(\frac{5}{6} - x = 5x\)
    • Rearranging gives: \(\frac{5}{6} = 6x\) (not equivalent to the original).
  3. \(4 - x + 1 = 6x\)

    • Combine like terms: \(5 - x = 6x\)
    • Rearranging gives: \(5 = 7x\) (not equivalent to the original).
  4. \(\frac{5}{6} + x = 6x + x\)

    • Simplifies to: \(\frac{5}{6} + x = 7x\)
    • Rearranging gives: \(\frac{5}{6} = 6x\) (not equivalent to the original).
  5. \(5 = 30x\)

    • Rearranging gives: \(x = \frac{1}{6}\) (not equivalent to the original).
  6. \(5 = 42x\)

    • Rearranging gives: \(x = \frac{5}{42}\) (not equivalent to the original).

Conclusion: The equations with the same solution set are:

  • Option 1: \(4 - 6x + 1 = 36x\) (which simplifies to \(5 = 42x\))
  • None of the other options have the same solution set as \(\frac{5}{6} - x = 6x\).
answers are
4 – 6x + 1 = 36x
5/6-x=6x
5 = 42x

now Solve the linear equation 2.25 – 11j – 7.75 + 1.5j = 0.5j – 1.

j = –0.45
j = –0.25
j = 0.25
j = 0.45

To solve the linear equation \(2.25 - 11j - 7.75 + 1.5j = 0.5j - 1\), follow these steps:

  1. Combine like terms on the left side: \[ 2.25 - 7.75 = -5.5 \] So the left side simplifies to: \[ -5.5 - 11j + 1.5j = -11j + 1.5j = -9.5j \] Therefore, the equation becomes: \[ -9.5j - 5.5 = 0.5j - 1 \]

  2. Rearrange the equation: To isolate the \(j\) terms on one side, add \(9.5j\) to both sides: \[ -5.5 = 0.5j + 9.5j - 1 \] Combine the \(j\) terms on the right side: \[ -5.5 = 10j - 1 \]

  3. Add \(1\) to both sides: \[ -5.5 + 1 = 10j \] \[ -4.5 = 10j \]

  4. Divide both sides by \(10\): \[ j = \frac{-4.5}{10} = -0.45 \]

Thus, the solution is: \[ \boxed{j = -0.45} \]

In the equation 6x – 2 = –4x + 2, Spencer claims that the first step is to add 4x to both sides. Jeremiah claims that the first step is to subtract 6x from both sides. Who is correct? Explain.

In the equation \(6x - 2 = -4x + 2\), both Spencer and Jeremiah propose different first steps to rearrange the equation. Let's analyze each of their claims:

  1. Spencer's Claim - Add \(4x\) to both sides:

    • If we add \(4x\) to both sides, we get: \[ 6x - 2 + 4x = -4x + 2 + 4x \] This simplifies to: \[ 10x - 2 = 2 \] This step is valid and will lead to a correct solution.
  2. Jeremiah's Claim - Subtract \(6x\) from both sides:

    • If we subtract \(6x\) from both sides, we get: \[ 6x - 2 - 6x = -4x + 2 - 6x \] This simplifies to: \[ -2 = -4x - 6x + 2 \quad \Rightarrow \quad -2 = -10x + 2 \] This step is also valid, and it will lead to a correct solution as well.

Conclusion:

Both Spencer and Jeremiah are correct because both of their proposed first steps yield valid manipulations of the equation. You can choose either one to begin solving the equation, and both will lead to the same final solution. The choice of which variable to move first is often a matter of preference, and either approach is mathematically sound.

Christopher is a graphic designer who creates business websites. It takes him 2.4 hours to complete one website page. He finds out about a new software program that will cut his time in half for completing one page, but it will take him 15 hours to learn the new program.

Which equation can be used to find the number of website pages, x, that Christopher needs to create so that his time spent using the new program will be the same as his current time?

options 2.4x=1.2x
2.4x=1.2x+15
2.4x+15=1.2x
2.4x=1.2x-15

To find the equation that represents the situation described for Christopher, we first need to analyze his current time spent creating website pages compared to the time spent using the new software program.

  1. Current time spent: Christopher takes 2.4 hours to complete one page. Therefore, for \(x\) pages, the total time spent is: \[ 2.4x \]

  2. Time spent using the new program: With the new software, it takes him half the time, which is: \[ \frac{2.4}{2} = 1.2 \text{ hours per page} \] For \(x\) pages, the time spent is: \[ 1.2x \]

    Additionally, we must account for the time it takes him to learn the new software, which is 15 hours.

  3. Setting up the equation: We want to find the number of pages \(x\) at which the time spent using the new program (including the learning time) equals the time spent currently. Therefore, we set up the following equation: \[ 2.4x = 1.2x + 15 \]

Conclusion:

The correct equation that can be used to find the number of website pages, \(x\), is: \[ \boxed{2.4x = 1.2x + 15} \]

How many website pages would Christopher need to create in order to save time using the new software program?

To find how many website pages Christopher needs to create in order to save time using the new software program, we can solve the equation we established earlier:

\[ 2.4x = 1.2x + 15 \]

Step 1: Subtract \(1.2x\) from both sides

\[ 2.4x - 1.2x = 15 \]

This simplifies to:

\[ 1.2x = 15 \]

Step 2: Divide both sides by \(1.2\)

\[ x = \frac{15}{1.2} \]

Step 3: Calculate \(x\)

To perform the division:

\[ x = 15 \div 1.2 = 12.5 \]

Conclusion:

Christopher would need to create at least 13 website pages to begin saving time using the new software program, since he cannot create a fraction of a page. Therefore, he needs to complete 14 pages for the time savings to be beneficial.

If we consider just the time when he starts saving time, mathematically, we say 12.5 pages. But realistically, he must complete a whole page to see any time savings, leading us to the conclusion that he needs to create at least 13 pages.

Two researchers are studying the decline of orangutan populations. In one study, a population of 784 orangutans is expected to decrease at a rate of 25 orangutans per year. In a second study, the population of a group of 817 orangutans is expected to decrease at a rate of 36 per year. After how many years will the two populations be the same?

The two populations will be the same after___
years.

To find out after how many years the two orangutan populations will be the same, we can set up equations for both populations.

  1. First Population (784 orangutans decreasing by 25 per year): \[ P_1(t) = 784 - 25t \]

  2. Second Population (817 orangutans decreasing by 36 per year): \[ P_2(t) = 817 - 36t \]

Setting the two equations equal:

To find \(t\) (the number of years when the populations are equal), we set \(P_1(t)\) equal to \(P_2(t)\):

\[ 784 - 25t = 817 - 36t \]

Step 1: Rearranging the Equation

Add \(36t\) to both sides:

\[ 784 + 11t = 817 \]

Step 2: Subtract 784 from both sides

\[ 11t = 817 - 784 \] \[ 11t = 33 \]

Step 3: Divide both sides by 11

\[ t = \frac{33}{11} = 3 \]

Conclusion

The two populations will be the same after 3 years.

So, the answer is: The two populations will be the same after 3 years.