Răspuns:
44:a=[305:61+(83+391:23)]:7+29
44:a=[5+(83+17)]:7+29
44:a=(5+100):7+29
44:a=105:7+29
44:a=15+29
44:a=44
a=44:44
a=1
_____________
P=2(L+l)
A=L·l
L=3l
144=2(3l+l)=>144:2=4l=>l=72:4=>l=18 m→ latimea
L=3·18=54 m → lungimea
A=18·54=>A=972 m²→ aria cand L=3l
L=l+14
144=2(l+14+l)=>144:2-14=2l=>58=2l=>l=58:2=>l=29 m
L=29+14=43m
A=29·43=1247 m² arai cand L=l+14
