Solve using substitution.

x − y = –5
x − 8y = 16
PLS HELP QUICK

x = -8, y = -3

Step-by-step explanation:

x - y = -5

x - 8y = 16

Let’s start by the second equation!

x - 8y = 16

Solve for y

-8y = 16 - x

y = -2 + x/8

Now substitute that into the first equation

x - y = -5

x - (-2 + x/8) = -5

x + -1(-2 + x/8) = -5

x + (-1)(-2) + -1(x/8) = -5

x + 2 + -1/8x = -5

(x + -1/8 x) + (2) = -5

7/8x + 2 = -5

7/8x = -7

x = 8/7 • -7

x = -8

Then go back to the second equation…

x - 8y = 16

-8 - 8y = 16

-8y = 24

y = 24/-8

y = -3

Top right since it passes vertical line test

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