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x + y - 2 = 0 +
3x - 9 = 0
3x = 9
x = 3
x + y - 2 = 0
x + y = 2
3 + y = 2
y = -1
Semoga membantu
x+y=2 (dikali 2) = 2x-2y=4
terus dikurang -3y=3
y=-1
2x-y=7
2x-(-1)=7
2x+1=7
2x=7-1
2x=6
x=3