x-x/4=9/20 3x/4=9/20 x=(9/20)÷(3/4)=(9/20)×(4/3) x=3/5 3x是怎样
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
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
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),
解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)
解分式方程 x-7/x-9+x-3/x-5=x-4/x-6+x-6/x-8
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
4x-3x(20-x)=5x-7x(20-x)
4x-3x(20-x)=5x-7x(20-x)的解法
x-3(20-x)=3x-7(9-x)
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)