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x+5y=2
dikurangi.. jadi x=6
masukkan ke per 2
x+5y=2
6+5y=2
5y=2-6
5y=-4
y=-4/5
b. y=2x-5
y=x+3
jadi
2x-y=5
x-y=-3
dikurang
x=8
masukkan ke pers 2
x-y=-3
8-y=-3
-y=-11
y=11