Respostas

2014-03-21T11:32:55-03:00
2(3 - 4z) - 5(2z + 3) = z - 17 
6-8z-10z-15=z-17 
6-15-8z-10z=z-17 
-9-18z=z-17 
8=19z 
1 1 1