2016-11-09 18:42发布
5分之3X+7分之4=1
3/5x=1-4/7
3/5x=3/7
x=3/7÷3/5
x=5/7
（5分之4+3.2）X=3分之2
4x=2/3
x=2/3÷4
x=1/6
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5分之3X+7分之4=1
3/5x=1-4/7
3/5x=3/7
x=3/7÷3/5
x=5/7
（5分之4+3.2）X=3分之2
4x=2/3
x=2/3÷4
x=1/6
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