1200/x-1200/(x+2)=30
看下题!1500/x-(300/x+1200/2x)=4
X-40%X+1200=2/3X怎么算
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
(20+2x)(40-x)=1200
(40-x)(20+2x)=1200
2x(56-X)-10=30+X
(2+X/1200)/(2+1.24X/1200)=
(40-x)(20+2x)=1200 800+80X-20X-2x^2=1200 -2x^2+60X-400=0 x^2
(X+X*20%)-[(1200-X)-(1200-X)*20%]=40%
X+X*20%-(1200-X)-(1200-X)*20%=40%
(40-x)(20+2x)=1200
x^2=(x+30)X(x-18)怎么解