Respostas

2014-03-03T17:01:57-03:00
(2 a + 6) /5 = (3 a + 1) / 2
2(2a+6)=5(3a+1)
4a+12=15a+5
12-5=15a-4a
7=11a
a=7/11 (0,6363636....)