Question

In the solution to this system of equations, you found that x=−10. Find the value of y.
You substituted −10 for x in the first equation and found that y=−17. What is the value of y when you substitute −10 for x in the second equation? Start by substituting −10 for x in the second equation.
y=2x+3
y=x−7

x
−10
=


y
=
x
−
7
y
=
−
7

Answer 1

To find the value of \( y \) when \( x = -10 \) in the second equation, we can substitute \( -10 \) for \( x \) in that equation. The second equation is:

\[
y = x - 7
\]

Now, substituting \( -10 \) for \( x \):

\[
y = -10 - 7
\]

Calculating that gives:

\[
y = -17
\]

Thus, when \( x = -10 \) in the second equation, the value of \( y \) is:

\[
\boxed{-17}
\]