0.9-(5分之4-3x+0.2x)=2分之3-x
问题描述:
0.9-(5分之4-3x+0.2x)=2分之3-x
答
0.9-(4/5-3x+0.2x)=3/2-x
0.9-0.8+3x -0.2x = 1.5-x
3.8x = 1.4
x = 7/19