8/5x-20=50-x
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8/5x-20=50-x
![8/5x-20=50-x](/uploads/image/z/20307181-13-1.jpg?t=8%2F5x-20%3D50-x)
8/5x-20=50-x
8/5+x=50+20
13/5x=70
x=70/13/5
x=350/13
8/5+x=50+20
13/5x=70
x=70/13/5
x=350/13
5*(x-2)=4*(x+3) 2x+(50-x)*4=140 3x-(8-x)=20*4 200x=(x-0.5)*2
求文档:解方程:x-x/12-x/7-x/8-x/4-x/20-x/5=30+120+300+50
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=?
x/50 -8 =x/60 +5
x/2+x/8+x/12+x/20=1
X-5+8*X=7*X-2*X-1
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
4x=5x+2/3 50%x-2=20%x+8 用移项的方法.
x-8分之3x+20=45 x-(30+50)=7分之5x 解方程!
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),