Question

using substitution
solve the system of linear equations using substitution.
$y = 2x - 10$
$-4x + y = -8$ $-4x + 2x - 10 = -8$
$-2x - 10 = -8$
$\quad \quad +10 \\ +10$
$\frac{-2x}{-2} = \frac{2}{-2}$
$x = -1$
$y = 2x - 10$
multiple-choice question
what is the value of y?
$y = -8$
$y = 12$
$y = -12$
$y = -11$
rewatch

Explanation:

Step1: Identify solved $x$ value

$x = -1$

Step2: Substitute $x$ into $y=2x-10$

$y = 2(-1) - 10$

Step3: Calculate final $y$ value

$y = -2 - 10 = -12$

Answer:

y = -12