Question

Solve the system of equations below. -3x+6y=9

5x+7y=-49
A. (1,-2)
B.(-2,-7)
C.(-7,-2)
D.(-2,1/2)​

Answer 1

`</p><p>-3x+6y=9 \\</p><p>5x+7y=-49 \\ \\</p><p>-15x+30y=45 \\</p><p>15x+21y=-147 \\ \\</p><p>51y=-102 \\</p><p>\underline{y=-2} \\ \\</p><p>-3x+6\cdot(-2)=9 \\</p><p>-3x-12=9 \\</p><p>-3x=21 \\</p><p>\underline{x=-7} \\ \\</p><p>\boxed{(-7, -2)}</p><p>`

The answer is C.

Hope this helps.

r3t40

Answer 2

(-7, -2) is the correct answer