2x+y=5
2(x-3)-6y=6
y=5-2x
2x-6-6(5-2x)=6
2x-30+12x=6+6
14x=42 /:14
x=3
y=5-2*3
y=-1
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2x+y=5
2(x-3)-6y=6
y=5-2x
2x-6-6(5-2x)=6
y=5-2x
2x-30+12x=6+6
y=5-2x
14x=42 /:14
y=5-2x
x=3
x=3
y=5-2*3
x=3
y=-1