Question

solve using substitution.
$y = -7$
$10x + 6y = -2$
(□, □)

Explanation:

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

We have the equation \( 10x + 6y = -2 \). Substitute \( y = -7 \) into it:
\( 10x + 6\times(-7) = -2 \)

Step2: Simplify and solve for \( x \)

First, calculate \( 6\times(-7) = -42 \), so the equation becomes:
\( 10x - 42 = -2 \)
Add 42 to both sides:
\( 10x = -2 + 42 \)
\( 10x = 40 \)
Divide both sides by 10:
\( x = \frac{40}{10} = 4 \)

Answer:

\( (4, -7) \)