Question

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 you substitute \(-10\) for \( x \) in the second equation, let's substitute \(-10\) into the equation \( y = x - 7 \):

\[
y = -10 - 7
\]

Now, calculating that:

\[
y = -17
\]

So, when you substitute \(-10\) for \( x \) in the second equation \( y = x - 7 \), you get:

\[
\boxed{-17}
\]