解应用题：(x+15)÷80%=(1+40%)x
（x+15)÷80%=(1+40%)x怎么解,要一步一步的.
人气：470 ℃ 时间：2020-01-25 22:01:09
解答
（x+15)÷80%=(1+40%)x
x+15=1.4x*0.8
x+15=1.12x
0.12x=15
x=125
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