solve using elimination.

2x + 3y = 6
4x - 3y = 8
(give details)

1 answer

To solve the system of equations using the elimination method, we have the following two equations:

  1. \( 2x + 3y = 6 \) \ \ \ (Equation 1)
  2. \( 4x - 3y = 8 \) \ \ \ (Equation 2)

Step 1: Align the Equations

We will align the equations for clarity:

\[ \begin{align*} 2x + 3y & = 6 \quad (1) \ 4x - 3y & = 8 \quad (2) \end{align*} \]

Step 2: Eliminate \(y\)

To eliminate \(y\), we can add the two equations. Notice that the coefficient of \(y\) in Equation 1 is positive (+3) and in Equation 2 is negative (-3). When we add both equations, the \(y\) terms will cancel out.

First, let's set the equations so we can add them directly:

\[ \begin{align*} 2x + 3y & = 6 \

  • (4x - 3y & = 8) \end{align*} \]

Now, perform the addition:

\[ (2x + 4x) + (3y - 3y) = 6 + 8 \]

This simplifies to:

\[ 6x + 0y = 14 \]

So we are left with:

\[ 6x = 14 \]

Step 3: Solve for \(x\)

Now we can solve for \(x\):

\[ x = \frac{14}{6} = \frac{7}{3} \]

Step 4: Substitute Back to Find \(y\)

Next, we substitute \(x = \frac{7}{3}\) back into one of the original equations to find \(y\). We will use Equation 1:

\[ 2x + 3y = 6 \]

Substituting for \(x\):

\[ 2\left(\frac{7}{3}\right) + 3y = 6 \]

This simplifies to:

\[ \frac{14}{3} + 3y = 6 \]

To isolate \(3y\), we first subtract \(\frac{14}{3}\) from both sides. We convert 6 into a fraction with a denominator of 3:

\[ 6 = \frac{18}{3} \]

So now we have:

\[ 3y = \frac{18}{3} - \frac{14}{3} = \frac{4}{3} \]

Now, divide by 3:

\[ y = \frac{4}{3} \div 3 = \frac{4}{9} \]

Final Solution

The solution to the system of equations is:

\[ \boxed{\left(\frac{7}{3}, \frac{4}{9}\right)} \]

This means the values \(x = \frac{7}{3}\) and \(y = \frac{4}{9}\) satisfy both equations in the original system.