x+25%x=12.5 17%x—100=240 x+20%=3.6 90%x—60%x=48

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x+25%x=12.517%x—100=240x+20%=3.690%x—60%x=48x+25%x=12.517%x—100=240x+20%=3.690%x—60%x=48x+25%x=12.51

x+25%x=12.5 17%x—100=240 x+20%=3.6 90%x—60%x=48
x+25%x=12.5 17%x—100=240 x+20%=3.6 90%x—60%x=48

x+25%x=12.5 17%x—100=240 x+20%=3.6 90%x—60%x=48
x+25%x=12.5
(1+25%)x=12.5
125%x=12.5
x=12.5÷125%
x=10

17%x—100=240
17%x=240+100
17%x=340
x=340÷17%
x=2000

x+20%=3.6
x=3.6-20%
x=3.6-0.2
x=3.4

90%x—60%x=48
(90%-60%)x=48
30%x=48
x=48÷30%
x=160

QQ2282658747QQ,你好:
x+25%x=12.5
125%X=12.5
X=12.5÷125%
X=10
17%x—100=240
17%X=240+100
X=340÷17%
X=2000
x+20%=3.6
120%X=3.6
X=3.6÷120%
X=3
90%x—60%x=4
30%X=4
X=4÷30%
X=40/3

1.25x=12.5
x=10

17%x=340
x=2000

x=3.4
30%x=48
x=160