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akan ketemu x= -1 dan y= 7
maka x - 7y = -1 - 7(7)= -1 -49 = -50
2x+3=19 | 1 | 2x+3y= 19
x-y=-8 | 2 | 2x-2y= -16
----------------- -
5y = 35
y = 7
• x-y= -8
x-7= -8
x= -8+7 Jadi: x-7y=
x = -1 -1-7(dikali 7)
= -1-49
= -50