" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Media = ( 5 + 9 + 12 + x ) / 4 = 9
26+x = (9)(4)
26 + x = 36
x = 36 - 26
x = 10 el cuarto número es 10