Which value of x and y when plugged into the equation will create the same value on both sides?
The best way to do this is by trial and error.
Let's try x = 3 and y = 14.
y = 2x + 8
14 = 2(3) + 8
14 = 6 + 8
14 = 14
We got the same answer on both sides.
Answer: Choice D(3, 14)
Understand?