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2745+b+563=563+2745
ajutor repede dau coroana


Răspuns :

2745+b+563=563+2745
b+
2745+563=563+2745
b+3308=3308
b=3308-3308
b=0
b=0 deoarece:
b+563=2745-2475 +563
b+563=563 =>b=0