What is the value of the y variable in the solution to the following system of equations

2x + y = 5
x + 3y = 0

2. Solve the following system.
x − y = 10
x + y = 4

thank you

-3(2x + y = 5)
x +3y = 0

-6x + -3y = -15
x + 3y = 0
-5x = -15
x =3

Plug x back into any of the original equations....
3+3y = 0
y = -1

in a more formal term:
(3, -1)


x-y=10
x+y=4

2x = 14
x = 7

plugging x back into any original equation....
7+y = 4
y = -3

in a more formal way...
(7, -3)