20x+50x+100(50-2x)=2400
5*(x-2)=4*(x+3) 2x+(50-x)*4=140 3x-(8-x)=20*4 200x=(x-0.5)*2
(X+X)+(X-X)+(X*X)+(X/X)=100
20%x+[25*(20%x)]+12=50%x+2
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
x/2*50+100=50x
x(20-2x)=50
求解几道方程.1/2x-20+1/2【x-(1/2x-20)】+20=x-50 x/(200-400/3)+x/(200
20*X+30*3X+70*(50-X-3X)=1800
2x-3分之1(x+1)=4x-(2x+50%)
30-3(3-X)=4X 3X+12*6=15X+12 4X-2(50-X)=20 12(X-13)=10(X+3) 1
x除55%=100 60%x=30 x+50%x=4.5 (1-25%)x=72 4x+40%x=176 解方程
X+30%X=52 X-10%x=27 20%x=24=40 2x-50%x=30