" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a+b=-40
a-b=-160
dodajemy stronami
2a=-200
a=-100
-100+b=-40
b=60
spr. -100+60=-40
-100-(60)=-100-60=-160