tolong jawab saya tuh kasih poin 38 pake caranya pliss dijawab

1. 5a+5=25
5a=25-5
5a=20
a=20/5
a= 4

2. sy krg ngerti
3. 1/2(4a+6)=18
4/2a+6/2=18
2a+3=18
2a=18-3
2a=15
a=15/2
a=7,5

maaf yg < saya kurang ngerti :)

1. 5a + 5 = 25
5a = 25 - 5
a = 20 : 5
a = 4

2. 3 (m.2) < 12
3m . 6 < 12
3m < 12 : 6
3m < 2
m < 2/3