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x-y=-4 (dikali 3) = 3x-3y=-12
trus dikurang: 5y=5
y=1
3x+2y=17
3x+2(1)=17
3x+2=17
3x=17-2
3x=15
x=5
3x + 2y = 17
3x + 2(x - 4) = 17
3x + 2x - 8 = 17
3x + 2x = 17 + 8
5x = 25
x = 5
y = x - 4
y = 5 - 4
y = 1
Himpunan penyelesaian = {x, y} = {5, 1}