Răspuns:
g=r+i
g+i+r=20
r+i+i+r=20=>2i+2r=20=>i+r=20:2=>i+r=10=>i=10-r
2g+4i+2r=48
2(r+10-r)+4(10-r)+2r=48
20+40-4r+2r=48
2r=60-48=>r=12:2=>r=6 rate
i=10-6=>i=4 iepuri
g=6+4=>g=10 gaini
nu pot fi 8 gaini
verificare:
6×2 picioare+4×4 picioare+10×2 picioare=12+16+20=48 picioare
