" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
U7=4a
U5=6+U3
U5=a+4b
a+4b=6+1+2b
2b=6
b=3
U7=a+18
4a= a+18
3a=18
a=6