3 X-1/5 X=7/2

问题描述:

3 X-1/5 X=7/2

我也不好╮(╯﹏╰)╭

14/5x=7/2
x=5/4

(3-1/5)X=7/2
14/5X=7/2
X=7/2÷14/5
X=5/4

15x/5-x/5=7/2
14x/5=7/2
x=5/4