9514 1404 393
Answer:
(5x -8) +96 +(5x +2) +4x +4x = 540
x = 25
Explanation:
It usually works to follow directions. The sum of angles is ...
(5x -8) +96 +(5x +2) +4x +4x = 540 . . . . An equation
18x +90 = 540 . . . . . . . . . collect terms
x +5 = 30 . . . . . . . . . divide by 18
x = 25 . . . . . . . . subtract 5