x=2x-1.8怎么解

2x+x=1.8怎么解 x=2x-1.8怎么解 x^2=(x+30)X(x-18)怎么解 x*x+2*x+1=36,x怎么解, x+1.8x=15.68怎么解? 1.8x-x=2.4怎么解 1.8x-6=x怎么解? x-1.8x=25.2怎么解 x/(x-2)=1.8怎么算 (180x-36*x)/(x+2x)*2x=(180x-36*x)/(x+2x)*x+36x 这个怎么解啊···· 2x-56=x怎么解 x^2-x=56怎么解 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