" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
x+y+10=6x-6y
10=5x-7y
2). x=y+6
x-y=6
3). 5x-7y=10
7x-7y=42
-2x=-32
x=16 tahun