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stiind ca a+a+a=9 b-a=24 afla b+a


Răspuns :

a+a+a=9
3a=9
a=3
b-a=24
b=24+a
b=24+3
b=27
a+b=27+3=30
pai daca a+a+a=9 atunci3a=9 rezulta a=9supra3=3
a=3
b-a=24------b-3=24-------b=24+3=27
atunci b+a=27+3=30