Question

X + y = 3 3x - y = -11

Answer 1

I hope this helps you



-2+y=3


y=2+3


y=5

Answer 2

{ x + y = 3
 3x - y = - 11
-------------------------
4 x = - 8

x = - 8 / 4

x = - 2

For y :

3 x - y = -11

3*(-2) - y = - 11

- 6 - y =  - 11

- y = - 11 + 6

- y = - 5  * ( - 1 )

y = 5

S = { -2 , 5 }

hope this helps!