(x-5)÷x=0.29
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
x-x/5=2.4 (求未知数x) 12÷5%x=8 4x+x=12.5
x-x÷5=2.4 急
(5x+14)÷(x+2)=?
(x-5)÷x=20%咋解
先化简再求值 x/(x+2)-(x²+2x)/(x-5)÷[(x²-1)/(x-1)] 其中x=根号
2x+3x+4x+5x+x+6x+7x=100
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)