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2x + 5y = -2 | x 3| 6x + 15y = -6 -
-19y = 38
y = -2
3x - 2y = 16
3x - 2(-2) = 16
3x + 4 = 16
3x = 16 - 4
3x = 12
x = 4
jadi 5x + 3y =
5(4) + 3(-2) = 20 - 6 = 14 (b)