解方程:(0.3分之x-1)-(0.5分之x+2)=120%

(x/0.3-1)-(x/0.5+2)=120% x/0.3-1-x/0.5-2=1.2 10x/3-2x-3=1.2 10x-6x-9=3.6 4x=12.6 x=3.15=63/20