x/4 +2=3/5
x/4=3/5 -2 ……移项(两边都减2)
x/4=3/5-10/5
x/4= - 7/5 ……化简
x = - 7/5 ×4 ……移项(两边都乘以4)
x = - 28/5
x = - 5.6