x-2.8-(1/3x-0.3)=1/2x

问题描述:

x-2.8-(1/3x-0.3)=1/2x

x-2.8-(1/3x-0.3)=1/2x
x-2.8-1/3x+0.3=1/2x
x-1/3x-1/2x=2.5
6x-2x-3x=15
x=15