Question

intr-o curte sunt iepuri si gaini.in total sunt 27 capete si 82 picioare.cati iepuri si cate gaini sunt?

Answer 1

4a+2b=82
a+b=27
a=27-b
4(27-b)+2b=82
108-4b+2b=82
2b=26
b=26/2=13 gaini
a=27-13=14 iepuri 

Answer 2

a-iepuri,b-gaini
a+b=27 capete
4a+2b=82
a=27-b
4(27-b)+2b=82
108-4b+2b=82
108-82=4b-2b
26=2b
b=13
a=27-13=14