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2x - 5y = -8 | x3 | 6x - 15y = -24
----------------------- -
19y = 38
y = 2
Jika y=2, maka x :
2x - 5.2 = -8
2x - 10 = -8
2x = -8 +10
2x = 2
x = 1
8-2-5:1(x)
7-3-2:2(y)