" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
-x+2y=1 ×1⇒-x+2y=1 -
7x=7
x=1
⇒-x+2y=1
-1+2y=1
2y=2
y=1
HP= { 1,1}