Jawabanmu

2014-01-10T13:56:02+07:00
2a + 3a =5a
5 + 6a =5+6a
7a + 5b =
2a x a =2a^2
7b x (-2)a =-14ab
12b : b =12
3a : 6a =1/3
10 : 5a =
2a
klo gk salah itu
2014-01-10T14:29:23+07:00
2a + 3a = 5a
5 + 6a = 11a
7a + 5b = 12ab
2a x a = 3a
7b x (-2)a =
12b : b = 12b
3a : 6a = -3a
10 : 5a =
5a