Question

Suma a doua numere este 225, iar diferența lor este 15.SA se afle cele doua numere

Answer 1

$x+y=225$
$x-y=15$
$y=(225-15):2$
$y=210:2$
$\boxed{y=105}$
$x+105=225$
$x=225-105$
$\boxed{x=120}.$

Answer 2

A+B= 225 A-B=15 A= B+15 B+15+B=225 2xB+15=225 2xB=225-15 2xB=210 B=210:2 B=105 A=105+15 A=120