Question

For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

x − y = 8
−x − y = −7

8 − y

−8 − y

8 + y

−8 + y <-- this is the answer I got correct me if i got it wrong thanks

Answer 1

x - y = 8 -- add y to both sides
x = y + 8
you would sub y + 8 in for x in the second equation
same thing as 8 + y

Answer 2

thank you @texaschic101

Answer 3

anytime :)

Answer 4

:)