Solve the system of equations.

5x–4y=–44

–x+3y=22
(1 point)

1 answer

To solve the system of equations:

  1. \( 5x - 4y = -44 \) (Equation 1)
  2. \( -x + 3y = 22 \) (Equation 2)

We can use the substitution method or the elimination method. Here, we will use the substitution method.

First, let's solve Equation 2 for \( x \):

\[ -x + 3y = 22 \]

Adding \( x \) to both sides:

\[ 3y = x + 22 \]

Now, isolate \( x \):

\[ x = 3y - 22 \quad (3) \]

Next, substitute \( x \) from Equation (3) into Equation 1:

\[ 5(3y - 22) - 4y = -44 \]

Expanding this gives:

\[ 15y - 110 - 4y = -44 \]

Combine like terms:

\[ 11y - 110 = -44 \]

Now, add 110 to both sides:

\[ 11y = 66 \]

And then divide by 11:

\[ y = 6 \]

Now that we have \( y \), we substitute \( y = 6 \) back into Equation (3) to find \( x \):

\[ x = 3(6) - 22 \] \[ x = 18 - 22 \] \[ x = -4 \]

Thus, the solution to the system of equations is:

\[ (x, y) = (-4, 6) \]

To check our solution, let's plug \( x = -4 \) and \( y = 6 \) back into the original equations:

  1. For the first equation: \[ 5(-4) - 4(6) = -20 - 24 = -44 \quad \text{(correct)} \]

  2. For the second equation: \[ -(-4) + 3(6) = 4 + 18 = 22 \quad \text{(correct)} \]

Both equations are satisfied. Therefore, the final answer is:

\[ \boxed{(-4, 6)} \]