x*1.4*0.9-x=260怎么解
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x*1.4*0.9-x=260怎么解x*1.4*0.9-x=260怎么解x*1.4*0.9-x=260怎么解1.26x-x=2600.26x=260x=1000
x*1.4*0.9-x=260怎么解
x*1.4*0.9-x=260怎么解
x*1.4*0.9-x=260怎么解
1.26x-x=260
0.26x=260
x=1000
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