Question

resolva o sistema {x + y = 60
{5x- y = 210

Answer 1

{x + y = 60
{5x - y = 210
===========
6x = 270
x = 270/6
x = 45

x + y = 60
45 + y = 60
y = 60 - 45
y = 15



S={ 45, 15 }



★Espero ter ajudado!