Răspuns :
3a=4b => a=4b/3
a+b=14 => 4b/3+ b=14 => 4b/3+3b/3=14 =>
7b/3=14 => 7b=42 => b=6 => a= 4•6/3=8
a+b=14 => 4b/3+ b=14 => 4b/3+3b/3=14 =>
7b/3=14 => 7b=42 => b=6 => a= 4•6/3=8