Jawabanmu

2014-02-19T20:20:15+07:00
-7a+8=3a-22

-7a-3a = -8-22
-10a = -30
a  = -30/-10
a  = 3
2014-02-19T20:44:59+07:00
-7a-3a=22+8= -10a=30 a=30/10 a=3 jadi nilai a=3