Question

Trei copii au impreuna 394 baloane.Cate balanoane are fiecare,daca primul si al doilea au 157 baloane,iar al doilea si al treile 264 baloane?

Answer 1

A+B+C=394
A+B=157|=> A=157-B
B+C=264| =>C=264-B
daca punem relatiile acolo sus in prima adica;    157-B+B-B+264=394  <=>      421-B=394 =>B=27
INLOCUIM IN  CELE DOUA RELATII DE MAI SUS PT A AFLA A SI B;
A=157-27=130;
B=264-27=237

Answer 2

aflam ,,c,, 394-(a+b)=
=394-157
=237
aflam ,,b,, b+c=264
b+237=264
b=264-237
b=27
aflam ,,a,, a+b+c=394
a+27+237=394
a=394-264
a=130