(8a-7b)-(4a+5b)+(-2b+3a)
(8a-7b)-(4a+5b)+(-2b+3a)
数学人气:662 ℃时间:2020-03-31 13:15:57
优质解答
原式=8a-7b-4a-5b-2b+3a=7a-14b
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