Question

Suma a trei numere este 48. Daca din fiecare se scade acelasi numar se obtin numerele 5, 6, 7.Care sunt numerele?

Answer 1

$a+b+c=48 \\\\ a-x=5 \\\\ \boxed{a=5+x} \\\\ b-x=6 \\\\ \boxed{b=6+x} \\\\ c-x=7 \\\\ \boxed{c=7+x} \\\\ 5+x+6+x+7+x=48 \\\\ 3x+18=48 \\\\ 3x=48-18 \\\\ 3x=30 \ |:3 \\\\ \boxed{\boxed{x=10}} \\\\ a=5+10 \\\\ \boxed{a=15} \\\\ b=6+10 \\\\ \boxed{b=16} \\\\\ c=7+10 \\\\ \boxed{c=17}$