Respostas

2013-10-03T18:04:30-03:00
2x+6 = x+18
2x = x + 18 - 6
2x - x = 12
x = 12
1 5 1
2013-10-03T18:05:15-03:00
2x+6=x+18
2x - x = 18-6
1x = 12
x = 12
1 5 1