已知2x-3y=1 则10-2x+3y=?
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已知2x-3y=1 则10-2x+3y=?
已知2x-3y=1 则10-2x+3y=?
已知2x-3y=1 则10-2x+3y=?
10-2x+3y
=10-(2x-3y)
=10-1
=9
9
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