(x-1)/0.2=(2x-0.3)/0.3(x-1)/(1/5)=(2x-0.3)/(3/10)5(x-1)=10/3(2x-3/10)5x-5=20/3x-115x-15=20x-3-5x=12x=-12/5
0.2分之x-1=0.3分之2x-0.35x-5=20x/3 -15x/3=-4x=-12/5
5
