You have to multiply the whole bottom half by -2. This way you can eliminate either your x or y. So...
-20x+4y=16
20x-4y=36
Then you solve going down so...
The x's cancel out and so do the y's, so all that is left is 16+36 which is 52. Since 0 on the other side is not equal to 2, the answer would be no solution.
