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2x + 3y = -16
Metode Substitusi
2x + 3y = -16
⇒ 2x + 3 (-3x - 10) = -16
⇔ 2x - 9x - 30 = -16
⇔ -7x - 30 = -16
⇔ -7x = -16 + 30
⇔ -7x = 14
⇔ x = -2
3x + y = -10
3(-2) + y = -10
-6 + y = -10
y = -10 + 6
y = -4
3x - 2y =......
3(-2) - 2(-4) =.....
-6 + 8 = 2