Question

Calcular, x e y sabendo-se que x : y = 5 : 12 e x + y = 17.

Answer 1

{x/y = 5/12
{x + y = 17

x = 17 - y

x/y = 5/12

17 - y/y = 5/12
204 - 12y = 5y
17y = 204
y = 12

x = 17 - 12
x = 5

S = {5, 12}