a+b=65
a*3+b*2=180....=> 3a+2b=180
3a+2b-2a+2b=180-65*2
a=180-130
a=50
b=65-50
b=15
a) |_____|_____|_____|
b) |_|_|
-----------------
3a+2b=180
2a+2b=65*2
2a+2b=130
3a+2b-2a+2b=180-130
a=50
b=65-50
b=15....=> a-b=50-15....=> a-b=35...=> a>b cu 35
50+15=65
50*3+15*2=
=150+30
=180