Question

Solve each system by substitution

y=4x
x-2y=56

Answer 1

x=−8

y=−32

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Answer 2

-8

Explanation:

Since it tells you that y=4x you can use that to replace y in the next equation so now it's

X-2(4x)=56

Distribute the -2

X-8x=56

Subtract -8x from x

-7x=56

Divide by -7

X=-8