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.

Question

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:

\[ \boxed{-17} \]