2x-4y-6=0,求3x-6y+5

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2x-4y-6=0,求3x-6y+5
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2x-4y-6=0,求3x-6y+5
2x-4y-6=0,求3x-6y+5

2x-4y-6=0,求3x-6y+5
x-2y=3,
3(x-2y)+5 = 14