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3x + y = -10 (x3) ⇒ 9x + 3y = -30
2x + 3y = - 16 - (x1) ⇒ 2x + 3y = - 16 -
7x = -14
x = -2
2. menstubtitusi nilai x ke per.(1)
3x + y = -10
(3 x (-2)) + y = -10
-6 + y = -10
y = -4
⇒ maka nilai 3x - 2y =
(3 x (-2)) - (2 x (-4)) = -6 - (-8)
= 2
semoga membantu :)