79×8/5+7.21×160% 35-15%X=15 23-8/9÷5/6×15/16 2/5X-120×40%=12
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
15x=23x-24 12+5x=3x-8 3(x-3)=9-(x+6)解 4+x=4x-17解
(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
79×8/5+7.21×160% 35-15%X=15 23-8/9÷5/6×15/16 2/5X-120×40%=12
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
2x-10=15x+30,6x-6=6x+2,9-3x=2x-8,5x=9x-50 ,5y-5=12-6y,15x-9=
x+15%x=3.22 ,1/2x-25%x=10 ,x*(1-37.7%)=5/8 ,40%x=16 ,19-120%
有几道题想请教一下7x=6x-4 x-15=74 3x=2x+5 -5x=8-4x 9y=6y-6 8x=4x+1 7x
四道方程:2x+6=5x 6x-28=2x 8(x-3.6)=0.8x 15x-110+7x=110
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),