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x:9/25=0.05:9/5 3/4x/75%=6/31 (两道题解方程)
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x:9/25=0.05:9/5
解:9/5x=9/25×0.05
x=9/25×1/20×5/9
x=1/100
3/4x:75%=6:31
解:3/4x×31=6×75%
x=9/2×4/3×1/31
x=6/31
解:9/5x=9/25×0.05
x=9/25×1/20×5/9
x=1/100
3/4x:75%=6:31
解:3/4x×31=6×75%
x=9/2×4/3×1/31
x=6/31
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