Respostas

2014-08-05T17:55:08-03:00
2.x+11=23
2x=23-11
2x=12
x=12/2
x= 6
2014-08-05T17:55:14-03:00
2x+11=23
2x=23-11
2x=12
x=12
     2
x=6

Espero ter ajudado..