Question

Doi frati au impreuna acum 41 ani.Cand primul avea 11 ani,al doilea avea 6 ani.Cati ani are fiecare acum?

Answer 1

$a+b=41 \\\\ a=11+x \\ b=6+x \\\\\\ 11+x+6+x=41 \\\\ 17+2x=41 \\\\ 2x=41-17 \\\\ 2x=24 \ \ \ |:2 \\\\ \boxed{x=12} \\\\\\ a=11+12 \to \boxed{\boxed{23 \ ani \ are \ primul \ acum}} \\\\\\ a=6+12 \to \boxed{\boxed{18 \ ani \ are \ al \ 2lea \ acum}}$

Answer 2

11-6=5(diferenta intre frati)
un frate are 23 si celalalt 18
23+18=41