解方程2：3=X：51
3/4X－5％X=17.5
人气：379 ℃ 时间：2020-03-16 02:11:53
解答
2：3=X：51
x=2*51÷3
x=34
3/4X－5％X=17.5
0.75x-0.05x=17.5
0.7x=17.5
x=17.5÷0.7
x=25
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