设甲为X
20%X=40*80%
解方程得:X=160
甲数的20%与乙数的5分之4相等,乙数是40,甲数是几?(用方程解)
甲数的20%与乙数的5分之4相等,乙数是40,甲数是几?(用方程解)
数学人气:940 ℃时间:2019-11-06 16:50:12
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