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Ana ,Mihai si Dorina au in total 1.400 de nuci. Cate nuci are fiecare copil ,daca Ana si Mihai au in total 1.246 nuci , iar Mihai si Dorina au 1.370 nuci ?

Răspuns :

1400-1246=154 dorina
1370-154=1216 mihai
1246-1216=30 ana
154+1216+30=1400
a=Ana  b=Mihai    c=Dorina
a+b+c=1.400
a+b=1.246
b+c=1.370
1.246+c=1.400
c=1.400-1.246=154
a+1.370=1.400
a=1.400-1.370=30
154+30=184(Dorina+Alina)
184+b=1.400
b=1.400-184=1.216

deci,Alina=30 Mihai=1.216 Dorina=154