x+x÷3+2x-30=180

x+x÷3+2x-30=180 化简 [3x/(x+2)-x/(x=2)]÷x/(x^2-4)化简 [3x/(x+2)-x/(x-2)]÷x/(x^2-4 x-2/3x+x+2/7x=30 X^2-3X-2=0,求( x - 2x-1/x )÷(x-1)/(x^2-2x) (X+1)X(X+2)X(X+3)=504 x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)2.2/3+x/(3x-1)=1/9x-3 2x^2-4x/x+2`x^2+2x/x^2-4x+4÷x/3x-6,其中x=根号3/2 2x^2-4x/x+2`x^2+2x/x^2-4x+4÷x/3x-6,其中x=根号3/2 一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 化简求值：(3x/x+2-x/x-2)÷2x/x^2-4,x=-3 先化简再求值[3x/(x+2)-x/(x-2)]÷2x/(x^2-4)x=2010 x=根号3时,代数式（x/x-1-x/x+1)÷2x/1-x的值是? 先化简,再计算2x^-18/4-4x+x^ ÷ 3-x/x^+x-6,其中x=4 x-2/5x-(x-2/5x)2/3-(2/5x-1/3x)=30求x (x^2-3x+1) (x^2+3x+2)( x^2-9x+20)= -30求X 计算：(x+1)x=7 (x-1)(x+2)=30 (3-x)(3-x)+x=9 x+3/2x+3/2x+x+30=180解方程 ,急