4x+5=5x-4 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-2x+3x-4x+5x.+99x-100x=25求解 2x+3x+4x+5x+x+6x+7x=100 (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=? 提取公因式:已知x*x-5x+1=0 求x*x*x-4x*x-4x-1 x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? x^-6x+5=x+4 5*4x+x*x=80 y=|-x.x+4x+5| 写过程x(x-1)+2x(x+1)-3x(2x-5)-x(3x-2)+2x(2-x)=-5x(x-2)-4 x-x/4=x/4+4x/5-30. x-3/4x=(108-x)-4/5x 4x-7x=9-5x x=? 4x-3x(20-x)=5x 解方程；x/x-4=5x/x-2 x-8/x-4=2-x-5/x-7