Respuestas

2013-12-13T22:14:46+01:00
  • Usuario de Brainly
2013-12-13T22:15:04+01:00
Numero: ``x´´
x + x/5 = 18
5x/5 + x/5 = 18*5/5
(5x + x)/5 = 90/5
5x + x = (90*5)/5
5x + x = 90
6x = 90
x = 90/6
x = 15

el numero es 15