2x-56=x怎么解

2x-56=x怎么解 x^2-x=56怎么解 x^2=(x+30)X(x-18)怎么解 x*x+2*x+1=36,x怎么解, 10*[2-x]-9*[2-x]-8*[2-x]-7*[2-x]=56怎么解 30（x-2）+（x-4）-[10(x-2)+x]=56 怎么解 x-2x-7x=4x-56怎么解 x^-x-56=0,怎么解, (180x-36*x)/(x+2x)*2x=(180x-36*x)/(x+2x)*x+36x 这个怎么解啊···· x^2+x=91怎么解? 2x=5x怎么解 9-2x=x怎么解 2x=5x怎么解? x+x/2=15怎么解 x=2x-45怎么解 x^2-x=180 怎么解 x+2x=36怎么解 x=2x-3怎么解