(500*95%)/(500+x)=75%

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(500*95%)/(500+x)=75%
(500*95%)/(500+x)=75%

(500*95%)/(500+x)=75%
(500*0.95)/(500+x)=0.75
475/(500+x)=0.75
475=(500+x)*0.75
475=500*0.75+0.75x
475=375+0.75x
0.75x=100
x=100/0.75
x=400/3

(500*95%)/(500+x)=75%
500*95=75(500+x)
500*95/75=500+x
x=133又1/3

(500*95%)/(500+x)=75%
(500*95%)/75%=(500+x)
x=400/3

133.33333333

(500*95%)/(500+x)=75% 500-x/x=0.06 80%x+（500-X)60%=500*75% 急求：解方程 X-X×75%=500 (X/2)*150 + (X/2)*75 = 300*500 (10+X)(500-20X)=6000 ----------------------X=? 200+x=2/3*(500+x) x= 500*95%=75%*(500+X)求解这个方程 0.5（500-x)-0.5x=237.5x怎样解? x-15%x=42 500怎么解x x-1/4x=500-x+60 怎么算 X^2+50x=500,x是多少, 1000x-20x平方-500x=2700 500x[5/6X-4]=4000X (10+x)(500-20x)=6000 x/19+(500-x)/10=32 (0.3-x)(500+4000x)=180 600+x=1.1(500+x)