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解方程x-0.25x=75 3.2x+0.5x=18.2并要过程

x-0.25x=75解:0.75x=75 x=75÷0.75 x=1003.2x+0.5x=18.2解:3.7x=18.2 x=18.2÷3.7 x=4.92

x-0.25= x=1/4+0.25x=1/4+1/4x=1/2

解:1X-0.5x=0.25 0.5x=0.25 x=0.25除以0.5 x=0.5

x=4

(1)x-0.25x=3, (1-0.25)x=3, 0.75x=3, 0.75x÷0.75=3÷0.75, x=4;(2)x+ 2 5 x=21,(1+ 2 5 )x=21, 1.4x=21,1.4x÷1.4=21÷1.4, x=15;(3)3.6x÷2=2.16, 3.6x÷2*2=2.16*2, 3.6x=4.32, 3.6x÷3.6=4.32÷3.6, x=1.2.

x-0.25x=9.75 (1-0.25)x=9.75 0.75x=9.75 x=9.75÷0.75 x=13 ~~~~ 采纳吧

x-0.25x=75的解方程0.75x=75x=75÷0.75x=100

x(1-0.25)=0.375 0.75x=0.375 x=0.5

x-0.25x=3解:(1-0.25)x=3 0.75x=3 0.75x÷0.75=3÷0.75 x=4

把穿同样衣服的分别放在一边就可以得到x-0.2x=0.25+0.25变等号位置也要变符号,加的变减,减的变加.就可以得到0.8x=0.5再相除就是啦.0.5/0.8x=0.625

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