15 + 2X = 21(1 point) Responses x=7 x=7 x=6 x=6 x=3 x=3 10 10 Question 2 x5 = 20 (1 point) Responses 4 4 100 100 15 15 25 25 Question 3 2X + 5 = 25(1 point) Responses 20 20 10 10 7 7 5 5 Question 4 -6x + 4 = 22(1 point) Responses -3 -3 6 6 7 7 3 3 Question 5 8x - 4 = 6x + 2(1 point) Responses x=3 x=3 x=8 x=8 x=2 x=2 x=10 x=10 Skip to navigation

1 answer

Let's solve each of the equations step by step.

Question 1: \[ 15 + 2X = 21 \]

To isolate \( X \):

  1. Subtract 15 from both sides: \[ 2X = 21 - 15 \] \[ 2X = 6 \]
  2. Divide by 2: \[ X = 3 \]

Answer: x = 3


Question 2: \[ x^5 = 20 \]

To solve for \( x \), take the fifth root of both sides: \[ x = 20^{1/5} \] This does not yield a straightforward integer. Let's evaluate the possible responses: The closest integer response is: Answer: 4 (This assumes approximate answers, as \( 20^{1/5} \approx 2.5\))


Question 3: \[ 2X + 5 = 25 \]

To isolate \( X \):

  1. Subtract 5 from both sides: \[ 2X = 25 - 5 \] \[ 2X = 20 \]
  2. Divide by 2: \[ X = 10 \]

Answer: x = 10


Question 4: \[ -6X + 4 = 22 \]

To isolate \( X \):

  1. Subtract 4 from both sides: \[ -6X = 22 - 4 \] \[ -6X = 18 \]
  2. Divide by -6: \[ X = \frac{18}{-6} \] \[ X = -3 \]

Answer: x = -3


Question 5: \[ 8X - 4 = 6X + 2 \]

To isolate \( X \):

  1. Subtract \( 6X \) from both sides: \[ 8X - 6X - 4 = 2 \] \[ 2X - 4 = 2 \]
  2. Add 4 to both sides: \[ 2X = 2 + 4 \] \[ 2X = 6 \]
  3. Divide by 2: \[ X = 3 \]

Answer: x = 3

Now, summarizing the final answers:

  1. x = 3
  2. 4
  3. x = 10
  4. x = -3
  5. x = 3