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2x - 3y = -6 lx2l 4x - 6y = -12
9x + 6y = 51
4x - 6y = -12 +
13x = 39
x = 3
y = 3x ( 3 x 3 = 9) + 2 y = 17
2y = 17-9 = 8
y=4
3x + 2y = 17 | × 2 | ⇒ 6x + 4y = 34
2x - 3y = -6 | × 3 | ⇒ 6x - 9y = -18 -
13y = 52
y = 4
3x + 2y = 17
3x + 8 = 17
3x = 9
x = 3
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Metode Substitusi :
2x - 3y = -6
2x = -6 + 3y
x = -3 + 3/2y
3x + 2y = 17
-9 + 9/2y + 2y = 17
-9 + 13/2y = 17
13/2y = 26
y = 4
x = -3 + 3/2y
x = -3 + 6
x = 3