Question

solve using substitution.
x = -7
-9x - 10y = -7
(\square, \square)
submit

Explanation:

Step1: Substitute \( x = -7 \) into the second equation

We have the equation \( -9x - 10y = -7 \). Substitute \( x=-7 \) into it:
\( -9(-7)-10y=-7 \)

Step2: Simplify the left - hand side and solve for \( y \)

First, calculate \( -9(-7)=63 \). So the equation becomes:
\( 63 - 10y=-7 \)
Subtract 63 from both sides:
\( - 10y=-7 - 63 \)
\( -10y=-70 \)
Divide both sides by - 10:
\( y = \frac{-70}{-10}=7 \)

Answer:

\((-7,7)\)