Question

suma a 2 nr este 54,iar dif 14. afla nr

Answer 1

a+b=54
a-b=14
-----------(+)
a+b+a-b=54+14
2a=68
a=34
b=54-34
b=20

Answer 2

$a+b=54\\a-b=14 \to \boxed{a=14+b} \\*****************\\14+b+b=54\\14+2b=54\\2b=54-14\\2b=40\\\bold{b=20}\\ \\ a+20=54\\a=54-20\\\ \bold{a=34}$