Question

Dana si Alin au rezolvat 63 de probleme. Cate a rezolvat fiecare daca Dana a rezolvat cu 23 mai putine decat Alin?​

Answer 1

Salut!

Răspuns: 43 probleme ✅

notam cu x- raspunsuri Dana  si y raspunsuri Alin

$\large{\blue{\bf{\left \{ {{x+y=63} \atop {x=23+y}} \right. <=> \left \{ {{y+23+y=63} \atop {x=23+y}} \right. <=> \left \{ {{2y=63-23} \atop {x=23+y}} \right. <=> \left \{ {{2y=40} \atop {x=23+y}} \right. <=>\left \{ {{y=20} \atop {x=23+20}} \right. <=>\left \{ {{y=20} \atop {x=43}} \right. }}}$