P1/P2 = 2/3 = l1/l2
A1/A2= l1 la patrat / l2 la patrat = 4/9
Unde P1 si P2 sunt cele doua perimeter si A1 si A2 sunt ariile d:
a/b=5/7
(a+b)/2=29.4 => a+b=58.8 => a=58.8-b =>
(58.8-b)/b=5/7====> 5b=7(58.8-b)====>5b=411.6-7b====>
12b=411.6====> b=34.3
a+34.3=58.8 ====> a=24.4
a+b=56
a/b=3/4⇒a=3b/4
3b/4+b=56
aducem la acelasi numitor si scapam de numitori inmultind cu 4
3b+4b=224
7b=224
b=32
a+32=56
a=24
