Answer:
Step-by-step explanation:
-3x + y = 0 ------------(I)
2x - 2y = -12 -----------(II)
Multiply equation (I) by 2 and add.
(I)*2 -6x + 2y = 0
(II) 2x - 2y = -12
-4x + 0y = -12
-4x = -12
Divide both sides by -4
x = -12/-4
x = 3
Plugin x = 3 in equation (I)
-3*3 + y = 0
-9 + y = 0
y = 0 + 9
y = 9
