Question

How do I solve this system using substitution?

y = 8 - x
7 = 2 - y

Answer 1

The second equation looks a bit off, but assuming there is no typo, then we have

7 = 2-y
y = -5

substitute that into the other equation to get

y = 8-x
-5 = 8-x
x = 13

Answer 2

How did you get y = -5?

Answer 3

It's okay, I figured it out. Thank you!

Answer 4

y = 8 - x
7 = 2 - y

Substitute the first equation into the second.

7 = 2 - (8 - x)
7 = 2 - 8 + x
7 = -6 + x > subtract 6 on both sides
7 + 6 = -6 + 6 + x
13 = x

Answer 5

Thank you so much Chelle! Literal life saver

Answer 6

for part 2 of that equation you would plug in 13 for x in y=8-x. so that would be y=8-13 which would give you -5.

the answer is (13, -5)

Answer 7

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