x+3/2=3/8怎样算?

问题描述:

x+3/2=3/8怎样算?
还有30米增加1/5米是( )米?
不好意思,打错了应该是x+3/2x=3/8

x+3/2=3/8
x=3/8-3/2
x=3/8-12/8
x=-9/8
还有30米增加1/5米是(30.2 )米?