(5x+1)/6-[(3x-1)/4-(3x+1) - 知识问答

(5x+1)/6-[(3x-1)/4-(3x+1)/3],其中x=-9

1个回答

(5x+1)/6-[(3x-1)/4-(3x+1)/3]
=2(5x+1)/12-[3(3x-1)/12-4(3x+1)/12]
=(10x+2)/12- (9x-3)/12+(12x-4)/12
=(13x+1)/12
=[13*(-9)+1]/12
=(-116)/12
=-29/3

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