Question

using substitution
solve the system of linear equations using substitution.
$y = 2x - 10$
$-4x + y = -8$
$-4x + 2x - 10 = -8$
$-2x - 10 = -8$
$\\ \\ \\ \\ \\ \\ \\ \\ \\ \\ +10 \\ +10$
$\\ \\ \\ \\ \\ \\ \\ \\ \\ -2x = 2$
multiple-choice question
what is the value of x?
$x = -1$
$x = 1$
$x = 18$
$x = 2$
rewatch

Explanation:

Step1: Isolate x term

$\frac{-2x}{-2} = \frac{2}{-2}$

Step2: Calculate final x value

$x = -1$

Answer:

x = -1