set them equal to their sum. which in this case is 141 then solve for x and plug it into your original equation to get your answer.
Given:
The point is (6,2).
To find:
The image of given point after rotation of 270 degrees.
Solution:
Let the given point be P(6,2).
Rotation of 270 degrees means the figure is rotated 270 degrees counterclockwise about the origin. So, the rule of rotation is

Using this rule, we get

Therefore, the image of given point is (2,-6).
The value of x would be 8
Sum means addition:
So...
1015 + 119 = 1134
Hope this helped!