" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
10 -x = -10
10 +10 = x
20 = x
Debe sustraerse el 20
10 - (20) = -10
10 -20 = -10
-10 = -10
entonces:
10-20
RESPUESTA = - 10
SUERTE