Respostas

2013-09-09T18:23:07-03:00
2013-09-09T19:21:33-03:00
X + 20% = 3 500 ==> (1+ 0,20)x ==> 3 500 ==> 1,20x = 3 500 ==> x = 3 500 : 1,20 ==> 2 750