50×48%+(50-x)×62.5%+ 2/3x=100×56% x=?

50×48%+(50-x)×62.5%+ 2/3x=100×56% x=? x+ x+(x*50%)=1.5X? x+3x+x-2+x+x+50%x=188 求x 50X=200+X*X 30%x=50%x-20x x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)...(x-49)等于多少? 50/x x/3分之2+(32-x)/62.5%=50 200x+50x等于50x平方 x等于 x+1/5x=48 3.6-15％x=2.4 7/8x-50％x=3/7 30％x+3=5.1 1/4z+3/8x=1/3 x-65％x =70 x-50%x=100 90-x=50+x x+50%x=400 0.4X=X-50 50％x+x=20 x+30％x=52 (x+x+23+x+50)=3x 怎么解 50x(x-1)+60x(x-4)=5100 250x - 2(x+50)(x+0.5)求x