1/8x+1=2x-0.2怎么算

x+1分之x-1 + 1-2x分之2x=0怎么算, x²+2x-6/x²+2x=1怎么算 (2x+1)²-(x+3)(3-x)=6x怎么简便算? (x+1)(x-2)-(x-1)的平方怎么算? 1.5X+20=1X（50-X)怎么算? y+(1+x)(2+x)(3+x)导数怎么算, 2/(X-2)+X/(X+3)=1 怎么解 X(X+2)+X+1=55怎么解? (X-3)/(X^2-4)*(X^2-4X+4)/(x^2-x-6)-1/(x+2)怎么算? 7x-3(2/3x+1/5x)-(x+2/5x)+2x,=5x怎么求出 2(x-1)(x+5)-3(x-2)-4x=2x的平方+7方程题怎么算? 2x/(x^2+x)-1/x=5/(x+1)怎么做?