" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
12n+4=5n+25
12n+4-4=5n+25-4
12n=5n+21
12n-5n=5n-5n+21
7n=21
7n/7=21/7
n=3
b