6x−10y=730

Question

7x-9=y
Solve the system by substitution.

Answer 1

substitute 7x-9 for y ... 6x - 10 (7x - 9) = 730
... 6x - 70x + 90 = 730

solve for x , then substitute back to find y

Answer 2

6x−10y=730
7x-9=y
Solve the system by substitution