Respostas

2014-03-26T20:26:56-03:00
3 = x   +   2
7    3x  +  4
3(3x +4) = 7 (x+2)
9x +12 = 7x +14
9x -7x = 14 -12
2x=2
x=1
2014-03-26T20:45:53-03:00
3 = x   +   2
7    3x  +  4
3(3x +4) = 7 (x+2)
9x +12 = 7x +14
9x -7x = 14 -12
2x=2
x=1 ACHO QUE E ISSO