Respostas

2014-06-19T20:26:29-03:00
X/2 = 8 ==> x = 8*2 ==> x = 16
5x = 30 ==> x = 30/5 ==> x = 6
x + 9 = 2 ==> x = 2 - 9 ==> x = -7
3x = 12 ==> x = 12/3 ==> x = 4
4x = 28 ==> x = 28/4 ==> x = 7