Question

x + y = k
x - y = k

The solution to the system shown is _____.

Answer 1

\[x+y=k\\
x-y=k\\
2x=2k\\
x=k\]

Answer 2

more simply put, the only way to add and subtract something from a number and get the same thing you started with is if the number added and subtracted is 0

Answer 3

solution is \(x=k,y=0\)

Answer 4

the only options are

0, k)
(2, 2)
(k, 0)