bagaimana caranya 2y+4x=0-6

2y + 4x = -6
2y = -6-4x
y= (-6-4x)/2

disubstitusikan

2 ((-6-4x)/2) + 4x = 0
-12-4x+8x = 0
4x = 12
x = 3

mencari y

2y + 4x = -6
2y + 4.3 = -6
2y + 12 = -6
2y = -18
y = -9