Draw a parallel line from the upper right corner to the bottom line forming a right triangle with 13 as the hypotenuse.
Call the drawn line distance a. We know a=12 because the two left angles are right angles (90degrees). b=the distance from where the line intersects x to the bottom right corner. Solve for b.
I know its lame... but I just wanted to test it...
Draw a parallel line from the upper right corner to the bottom line forming a right triangle with 13 as the hypotenuse.
Call the drawn line distance a. We know a=12 because the two left angles are right angles (90degrees). b=the distance from where the line intersects x to the bottom right corner. Solve for b.
(1212) + (bb) = 13*13
So 144 + b*b = 169
b*b = 25
So b = 5 which means x equals 16.
x=11+5=16
Solve i by breaking it into rectangle+right-angled triangle
Is it 16?
I got x=16