84x+576=120x+120x*30%
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84x+576=120x+120x*30%84x+576=120x+120x*30%84x+576=120x+120x*30%84x+576=120x+36x84x+576=156x576=72xx=
84x+576=120x+120x*30%
84x+576=120x+120x*30%
84x+576=120x+120x*30%
84 x +576 = 120x +36x
84x +576 = 156x
576 = 72x
x = 576/72
x =8
X=8
84x+576=120x+120x*30%
X-X/12-X/7-X/8-X/4-X/20-X/5-30-120-300=50解方程
x(120+x)*80％=x-76
x(x+1)(x-1)=120
x-x/4-120=x/2
0.5X+120+0.3X=X
x/（120-x）=x/60
x/(120-x)=(60-x)/60
25%X+三分之一X+120=X
536-120%x-x=x-80
X+120%X=44 30%X-18=54
40%x+(40%x-30)+120=x怎么解
(30+x)÷(120+x)=30%
120%x-30%x=1.8,
2×30x=40x+120
x-(20%x+55%x)=120 X是什么
(168+X)/(288+X)=(120-X)/X怎么解
x-20%x=120,