Question

Which equation shows the substitution method being used to solve the system of linear equations?

x – y = 7

x = y + 3


A) x = (7 – x) + 3

B) x – (y + 3) = 7

C) (y + 3) – y = 7

D) x – y = y + 3

Answer 1

I think it is answer C
Hope I helped