Question

[SISTEMA]
6x – 2y = 14
-x + 3y = -5

Answer 1

6x - 2y = 14

- x + 3y = -5 .(6) --> - 6x + 18y = -30

6x - 2y = 14

- 6x + 18y = -30

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

0 + 16y = -16 y = -16/16 y = -1

- x +3y = - 5 ----> - x + 3.(-1) = -5 - x = -5 + 3 - x = - 2 .(-1) x = 2

Answer 2

6x –2y = 14.

–x +3y = –5. (×6) =>
_______________

6x – 2y = 14
–6x +18y = –30
_____________
16y = –16

y = –16/16

y = –1
________
6x – 2y = 14
6x –2.(–1) = 14
6x +2 = 14
6x = 14–2
6x = 12
x = 12/6
x = 2


Resposta

S = {2, –1}