Question

x-25%x=36 3/4x-3/8=0.75 4/5（x-2/5)=8

Answer 1

您好：

x-25%x=36

0.75x=36

x=36÷0.75

x=48

3/4x-3/8=0.75

3/4x=3/4+3/8

3/4x=9/8

x=9/8÷3/4

x=3/2

4/5（x-2/5)=8

x-2/5=8÷4/5

x=10-2/5

x=9.6

不明白,可以追问

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