Question

x + y = k

x - y = k

The solution to the system shown is _____.

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

Answer 1

Add both the equations.
(x + y ) + ( x - y) = k + k
2x = 2k
Therefore, x = k.
Now, solve for y.

Answer 2

Wait, you don't even have to solve it because of the options. -.-'

Answer 3

ok

Answer 4

thanks