x-2/7x=25%怎么解
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x-2/7x=25%怎么解x-2/7x=25%怎么解x-2/7x=25%怎么解x-2/7x=25%5/7x=1/4X=1/4*7/5X=7/20x-2/7x=25%5/7x=1/4x=1/4×7/5x
x-2/7x=25%怎么解
x-2/7x=25%怎么解
x-2/7x=25%怎么解
x-2/7x=25%
5/7x=1/4
X=1/4*7/5
X=7/20
x-2/7x=25%
5/7x=1/4
x=1/4×7/5
x=7/20