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2(x-3)-6y=6
y=5-2x
2x-6-6(5-2x)=6
y=5-2x
2x-6-30+12x=6
y=5-2x
14x=42
y=5-2x
x=3
x=3
y=5-2×3
x=3
y=-1
[2(x-3)-6y=6]
y=5-2x
2x-6-6y=6
y=5-2x
2x-6y=12
y=5-2x
2x-6(5-2x)=12
y=5-2x
2x-30+12x=12
y=5-2x
14x=42
y=5-2x
x=3
y=5-2*3
x=3
y= -1
x=3