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Un taran avea70 de pasari:gaini si rate.Dupa ce vinde 15 gaini si cumpara 2rate,observa ca mai are 37 de gaini. Afla:a)cate gaini a avut;b)cate rate are acum.

Răspuns :

a) a avut 37+15=52 de gaini
b) a avut 70-52=18 rate
acum are 18+2=20 rate
g-gaini
r-rate
g+r=70 => r+52=70 => r=18 => 18+2=20
g-15=37 => g=52