500*0.95=(500+X)*0.75
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500*0.95=(500+X)*0.75500*0.95=(500+X)*0.75 500*0.95=(500+X)*0.750.75x=500*0.95-500*0.750.75x=10
500*0.95=(500+X)*0.75
500*0.95=(500+X)*0.75
500*0.95=(500+X)*0.75
0.75x=500*0.95-500*0.75
0.75x=100
x=400/3
500*0.95=(500+X)*0.75
500*19=(500+x)*15
15x=500*(19-15)=2000
x=2000/15=400/3
x=400/3
500-x/x=0.06
0.7x+0.9(500-X)=386
0.7x+(500-x)0.9=386 解方程
(10+X)(500-20X)=6000 ----------------------X=?
200+x=2/3*(500+x) x=
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
500*0.95=(500+X)*0.75
(10+x)(500-20x)=6000
x/19+(500-x)/10=32
(0.3-x)(500+4000x)=180
600+x=1.1(500+x)
解方程x(60-x)=500
(0.2-x)(500-100x)=120