Respostas

2014-05-18T21:13:25-03:00
1/3(6+x)=1/4(3x+12) 
2 + 1/3x = 3/4x + 3
1/3x - 3/4x = 3 - 2
1/3x - 3/4x = 1
-5/12x = 1
x = 1 / -5/12
x = -12/5
2 3 2