Question

Suma a doua nr este 18 iar diferenta 2. Afla care sunt cele doua nr.

Answer 1

a+b=18
a-b=2 → a=b+2
_________
b+2+b=18
2•b=18-2
2•b=16
b=16:2
b=8
a=8+2=10

Answer 2

$a + b = 18 \\ a - b = 2 = > a = b + 2 \\ b + 2 + b = 18 \\ 2b = 18 - 2 \\ 2b = 16 \\ b = 16 \div 2 \\ b = 8 \\ a = 18 - 8 \\ a = 10$