Question

4x + y = 6
{ x + y = 3​

Answer 1

4x+y= 6

x+y=3

x=3-y

4(3+y)+y= -6

12-4y+y= -6

12-3y= +6

+3y= -18

y = 6

----------------------------

x-6=3

x=9

Espero ter ajudado!