Respuestas

2013-09-27T19:44:47+02:00
1/3 (x - 1) = 4 + 1/5 (x + 1)
1/3 x - 1/3 = 4 + 1/5 x + 1/5
1/3 x - 1/5 x = 4 + 1/5 + 1/3
2/15 x = 68/15
x = (68/15) / (2/15)
x = 34
12 4 12