Question

Intr o curte alearga iepuri si gaini ,in total 60capete si 166 de picioare.Cate animale sunt de fiecare fel?

Answer 1

a=iepuri
b=gaini
a+b=60           ⇒b=60-a
4a+2b=166
4a+2(60-a)=166
4a+120-2a=166
2a=166-120
2a=46
a=46:2=23 iepuri
b=60-23=37 gaini

Answer 2

G=GAINI 
I=IEPURI
G+I=60
2G+4I=166
G=60-I
2(60-I)+4I=166
120-2I+4I=166
120-2I=166
2I=166-120
2I=46
I=46:2
I=23
G+I=60
G+23=60
G=60-23
G=37
SPER SA FIE BINE!