a)a-b=144
a=2b
2b-b=144, b=144
a=3b, 3b-b=144, b=72
a=4b, 4b-b=144, b=48
b) a-b=111
a=b*5+3
5b+3-b=111
4b=108, b=27
a=111-27=84
c) presupunem ca are numai iepuri
44*4=176
176-120=56 de picioare sunt in plus pentru ca avem gaini.
56:2=28 gaini
iepuri 44-28=16 iepuri
proba: 16*4+28*2=120