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x+75%x=49

x+75%x=49 解:1.75x=49 x=49÷1.75 x=28

解:75×(□+4) =75×□+75×4 =75×□+300 (75×□+300)-(75×□+4) =75×□+300-75×□-4 =75×□-75×□+300-4 =300-4 =296 答:他得到的结果与正确的结果相差296.

25X49加75乘49简便运算 =(25+75)x49 =100x49 =4900

这样

x÷75+x÷60=36 (1/75+1/60)x=36 3/100x=36 x=1200

500 把右边的减25移到左边变成50,把75%移到右边被85%减等于10%,50=10%x,所以x=500

解: X(1+40%)×75%=X+150 X×1.4×0.75=X+150 1.05X=X+150 1.05X-X=150 0.05X=150 X=150÷0.05 X=3000

25x49+75x17 =25x49+25x3x17 =25x49+25x51 =25x(49+51) =25x100 =2500

x+四分之一x=75 3x/4=75 x=75÷3/4 x=100 x-七分之三x=28 4x/7=28 x=28÷4/7 x=49

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