Respostas

2014-08-20T19:31:27-03:00
1)
10/15 = 3x + 1/ 5x - 2
50x - 20 = 45x + 15
50x - 45x = 15 + 20
5x = 35
x = 7

2) 
x - 5/ x+ 1 = 6/24
24x - 120 = 6x + 6
24x - 6x = 6 + 120
18x = 126
x = 7
3 5 3