Răspuns :
3a+3b=168 a+b=168/3 a+b=56 a-7=b+7 a-7=X =>a=X+7 b+7=X b=X-7 X+7+X-7=56 => 2X=56 X=56 /2 X=26 cand cele 2 nr.sunt egale a=7+X => a=7+26 a=33 primul nr. b=X-7 =>b=26-7 b=19 al 2-lea nr