Question

substitution (level 2)
this is the only question in this section
question
solve the system by substitution.
$-8x - y = 30$
$-2y = x$
answer attempt 1 out of 2
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Explanation:

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

$-8(-2y) - y = 30$

Step2: Simplify and solve for $y$

$16y - y = 30$
$15y = 30$
$y = \frac{30}{15} = 2$

Step3: Substitute $y=2$ into $x=-2y$

$x = -2(2) = -4$

Answer:

$(-4, 2)$