x-0.75x=420怎么算?
问题描述:
x-0.75x=420怎么算?
答
x-0.75x=420
0.25x=420
x=420/0.25
x=1680
x-0.75x=420怎么算?
x-0.75x=420
0.25x=420
x=420/0.25
x=1680