Question

suma a doua numere este225,iar diferenta este15
sa se afle cele doua numere

Answer 1

a,b=numerele
a+b=225
a-b=15
-------------------------,
a,b=?
----------,,
a-b=15 => a=b+15
a+b=225
b+15+b=225
2b=210
b=210:2
b=105

a=b+15
a=105+15
a=120

Answer 2

$a+b=225 \\ a-b=15\to \boxed{a=15+b} \\\\ 15+b+b=225 \\ 15+2b=225 \\ 2b=225-15 \\ 2b=210 /:2 \\b=105 \\ \\a-105=15 \\ a=120$