x/50+3(x+300)/100=300.x=?
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x/50+3(x+300)/100=300.x=?x/50+3(x+300)/100=300.x=?x/50+3(x+300)/100=300.x=?x/50+3(x+300)/100=300.2x+
x/50+3(x+300)/100=300.x=?
x/50+3(x+300)/100=300.x=?
x/50+3(x+300)/100=300.x=?
x/50+3(x+300)/100=300.
2x+3(x+300)=30000.
5x+900=30000
5x=29100
x=5820
x=5820
两边同时乘以100得到2x+3x+900=30000所以5X=29100所以X= 5820
x/50+3(x+300)/100=300.x=?
（X+X)+(X-X)+(X*X)+(X/X)=100
X-X/12-X/7-X/8-X/4-X/20-X/5-30-120-300=50解方程
30-3（3-X）=4X 3X+12*6=15X+12 4X-2(50-X)=20 12(X-13)=10(X+3) 100-X=3(20+X)
x+3x+x-2+x+x+50%x=188 求x
x-2x+3x-4x+5x.+99x-100x=25求解
2x+3x+4x+5x+x+6x+7x=100
3x=x+100 x=50
3x-2x(50-x)=30
30%x=50%x-20x
(100-x)*3*(1 2x%)300怎么算怎么把(100-x)*3*(1 2x%)＝300化成x^2-50x=0
3x=x+100 x=?
3X+30+X+X-15=?
x+35=(x+3x)*30%
30x+100=50x-10
3x+2(100-x )=300
3x+(100-x)=300
3x+(100-x)=300 ,