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3/4x+2y=-12 (x4) -> 3x+8y=-48 -
-10y=-60
y=6
y=6 subtitusi ke 1/2x-1/3y=2
-> 1/2x-1/3(6)=2
-> 1/2x-2=2
-> 1/2x=2+2
-> x=4.2
-> x=8
pembuktian
x=8, y=6
1/2x-1/3y=2
1/2(8)-1/3(6)=2
4-2=2