Answer:
x = -2/3
Step-by-step explanation:
1) 3x + 6 = 4y → 3x + 6 - 4y = 0
2) 3x + 2y = 0
3x + 2y = 3x + 6 - 4y
3x on both sides will get cancelled.
2y + 4y = 6
6y = 6
y = 1
Substitute y=1 to 3x + 2y = 0,
3x + 2(1) = 0