Help! Ill give brainliest! I just need to know how to solve.

Answer: x=5
Step-by-step explanation:
We can see that there is a 90 degrees right angle
That means that the sum of the other 2 angles is 90 degrees because the sum of the angles of a triangle is 180
6x + 11x+5 = 90
17x = 85
x=5
6x5=30
11x5 +5 = 60
90 + 30 + 60 = 180