化简:(1) -x+(x-3)(2) -1/6(3x-6)+1/3(6-3x)(3) (3m-2n)-(3m-6n+5)
1个回答
(1) -3
(2) -1/2(6-3x)
(3) 4n-5
(4) 3t^2-3t-8
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