−3x−4y=−23

3x−5y=5
(1 point)
Responses

(−5, 2)
left parenthesis negative 5 comma 2 right parenthesis

(5, 2)
left parenthesis 5 comma 2 right parenthesis

(−5,−2)
left parenthesis negative 5 comma negative 2 right parenthesis

(5,−2)

1 answer

To solve the system of equations

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

we can use the method of substitution or elimination. Let's use substitution in this case.

First, we can solve the second equation for \(x\):

\[ 3x - 5y = 5 \]

\[ 3x = 5 + 5y \]

\[ x = \frac{5 + 5y}{3} \]

Now, we can substitute this expression for \(x\) into the first equation:

\[ -3\left(\frac{5 + 5y}{3}\right) - 4y = -23 \]

This simplifies to:

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

\[ -5 - 5y - 4y = -23 \]

\[ -5 - 9y = -23 \]

Adding 5 to both sides gives:

\[ -9y = -18 \]

Dividing by -9:

\[ y = 2 \]

Now we can substitute \(y = 2\) back into the expression for \(x\):

\[ x = \frac{5 + 5(2)}{3} \]

\[ x = \frac{5 + 10}{3} \]

\[ x = \frac{15}{3} = 5 \]

So the solution is:

\((x, y) = (5, 2)\).

Therefore, the correct response is:

\((5, 2)\).