Question

Solve 2x + y = 7
x – y = –4



Answers:


(–1, –5) //
(1, 5) //
(–1, 5) //
(1, –5)

Answer 1

1, 5

Answer 2

thankyou! will you show me how you got that?

Answer 3

Add both equations, so you get 3x = 3, so x = 1
Sub x = 1 into the first equation so 2 + y = 7 so y = 5