x-20%x=4.8怎样算?
问题描述:
x-20%x=4.8怎样算?
答
x-0.2x=4.8
x(1-0.2)=4.8
0.8x=4.8
x=6
x-20%x=4.8怎样算?
x-0.2x=4.8
x(1-0.2)=4.8
0.8x=4.8
x=6