Question

You’re trying to find the value of y when x=2. You can use either equation to find the value of y. Start with y=−2x+5. Substitute 2 for x in this equation.
y=−2x+5
y=4x−7

y
=
-2x
+ 5
y
=
−2
⋅
+ 5

Answer 1

To find the value of \( y \) when \( x = 2 \) using the equation \( y = -2x + 5 \), substitute \( 2 \) for \( x \):

\[
y = -2(2) + 5
\]

Now, calculate:

\[
y = -4 + 5
\]

\[
y = 1
\]

So, when \( x = 2 \), the value of \( y \) is \( 1 \).

You can also verify using the second equation \( y = 4x - 7 \):

Substituting \( x = 2 \):

\[
y = 4(2) - 7
\]

Calculating:

\[
y = 8 - 7
\]

\[
y = 1
\]

The value of \( y \) is confirmed to be \( 1 \) for both equations.