Question

Find the solution to the system of equations-2 + 2y = -4 3x + 3y = -18

Answer 1

x = -2 and y = -4

Explanation:

use elimination or subatitution method

Answer 2

`\boxed{x = -2~~and~~ y = -4}`

Explanation:

-2x + 2y = -4 (times 3) -6x + 6y = -12

3x + 3y = -18 (times 2) 6x + 6y = -36

.

-6x + 6y = -12

6x + 6y = -36 +

12y = -48

`y = (-48)/(12)`

y = -4

.

Substitute the value of y to the one of equations

-2x + 2(-4) = -4

-2x - 8 = -4

-2x = -4 + 8

-2x = 4

`x = (4)/(-2)`

x = -2