Answer:
x= 8.5, 2x=17, (9x+5)=81.5
Explanation:
since the sum of the interior angles of a triangle is 180 degrees, you must add all of the angles and set them equal 180:

next distribute the 2 to 9x + 5.

next combine like terms (2x and 18x) and subtract 10 from 180.

finally, divide 170 by twenty.

the final answer is x=8.5
once x is determined, you can solve 2x and 9x+5.
