If 7x + 2y = 3 and x - 3y = 30, what is the solution

Question

asked Feb 20, 2018 24.3k views

1 Answer

Svetoslav Marinov · Answer 1 · 2018-02-24T10:08:27+0000

7x+2y=3 | ×3
x-3y=30 | ×2

21x + 6y = 9
2x - 6y = 60 +
--------------------------
23x / = 69
x = 69:23
x = 3

7x + 2y = 3
21 + 2y = 3
2y = -18
y = -9