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2x - 4y = 0 (x3) 6x - 12y = 0
-------------------- -
16y = 16
y = 1
2x - 4y = 0
2x - 4(1) = 0
2x - 4 =0
2x= 4
x = 2
3x +2y = 8 | x2 => 6x +4y = 16
2x - 4y = 0 | x1 => 2x - 4y = 0
__________+
8x = 16
x = 16 ÷ 8
x = 2
Metode Substitusi
3x + 2y = 8
3.2 +2y = 8
6 + 2y = 8
2y = 8 - 6
2y = 2
y = 2 ÷ 2
y = 1