Question

intr-o curte sunt 80 de pasari,gaini,rate si curci stiind ca 43 nu sunt rate, iar 38 nu sunt gaini,afla cate pasari sunt

Answer 1

1.cate gaini sunt?
80-43=37gaini
2.cate rate sunt?
80-38=42 rate
3.cate gaini si rate sunt?
37+42=79
4. cate curci sunt?
80-79=1 curca

Answer 2

Curci+rate+gaini=80
curci +gaini=43
-----------------------------------
rate=80-43=37


Curci+rate+gaini=80
Curci+rate=38
---------------------------------
gaini = 80-38=42

Curci=80-37-42=1