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代数式简化 1(5a+3b)+(3a-2b) 2 2(4x-6y)-3(2x+3y-1)
人气:244 ℃ 时间:2019-12-07 20:25:56
解答
1(5a+3b)+(3a-2b)
=5a+3b+3a-2b
=8a+b

2 2(4x-6y)-3(2x+3y-1)
=8x-12y-6x-9y+3
=2x-21y+3
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