Question

solve the system by substitution. -4x + 8y = 40 -2x = y answer attempt 1 out of 3 (\boxed{1}, \boxed{}) submit answer

Explanation:

Step1: Substitute $y=-2x$ into first equation

$-4x + 8(-2x) = 40$

Step2: Simplify left side

$-4x -16x = 40$
$\implies -20x = 40$

Step3: Solve for $x$

$x = \frac{40}{-20} = -2$

Step4: Find $y$ using $y=-2x$

$y = -2(-2) = 4$

Answer:

$(-2, 4)$