7.5[(X-2.5)/5-1]-5+2.5=X X=27.5
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
3/x-1=4/x 6/x+1=x+5/x(x+1)
【1】2x+2.5x+1.5x=5
5(x-7.5)=2.5x
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
提取公因式:已知x*x-5x+1=0 求x*x*x-4x*x-4x-1
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
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-1)/x -(1-x)/(x+1)=(5x-5)/(2x+2) x等于多少
5(x-8)=3x 4.2x-9=2.5x+2.9 9(2x-3)-2=5(2x-1)