Solve the system of two linear equations. −3x−4y=−23 3x−5y=5 (1 point) Responses (−5,−2) left parenthesis negative 5 comma negative 2 right parenthesis (5,−2) left parenthesis 5 comma negative 2 right parenthesis (−5, 2) left parenthesis negative 5 comma 2 right parenthesis

1 answer

To solve the system of equations:

  1. \(-3x - 4y = -23\)
  2. \(3x - 5y = 5\)

We can use either substitution or elimination. Here, I'll use the elimination method.

First, let's align both equations:

  1. \(-3x - 4y = -23\)
  2. \(3x - 5y = 5\)

Next, we'll add the two equations together to eliminate \(x\). To do this, we can multiply the second equation by 1 and add:

\[ -3x - 4y + (3x - 5y) = -23 + 5 \]

This simplifies to:

\[ -4y - 5y = -18 \] \[ -9y = -18 \]

Now, solve for \(y\):

\[ y = \frac{-18}{-9} = 2 \]

Now that we have \(y = 2\), we can substitute \(y\) back into one of the original equations to find \(x\). We'll use the second equation:

\[ 3x - 5(2) = 5 \] \[ 3x - 10 = 5 \] \[ 3x = 15 \] \[ x = 5 \]

Thus, the solution to the system of equations is \((5, 2)\).

So the answer is:

(5, 2).