Respostas

2013-11-16T19:57:36-02:00
3/x + 6/3x = 1/5
3/x + 2/x = 1/5
5/x = 1/5
x = 15.
Portanto S = {15}
2013-11-16T20:06:19-02:00
Se 3/x+6/3x=1/5

entao 3/x+2/x=1/5

5/x=1/5

Multiplicano cruzado ficaria

x=25

x={25}