6.8-32%x=2/5.

问题描述:

6.8-32%x=

2
5

6.8-32%x=

2
5

6.8-32%x+32%x=
2
5
+32%x,
       6.8-
2
5
=
2
5
+32%x-
2
5

     6.4÷32%=32%x÷32%,
            x=20.