Respostas

2014-08-18T17:52:55-03:00
RESOLUCAO:
3K-9+8K-20+4K=0
15K=29
K=29/15
2014-08-18T17:56:56-03:00
Olá...

(k-3).3+(2k-5).4+4k=0

3k-9 + 8k-20 + 4k = 0

15k =  29

k = 29/15

^^