Respostas

2013-04-21T20:31:20-03:00

2x+6+x+8+3x-2

6x+12

x=12/6

x=2

1 5 1
2013-04-21T22:03:46-03:00

8x+9x+3x-2=

17x+3x-2=

20x-2=

18x