Answer:
Step-by-step explanation:
The trick to solving this problem is to know and remember that the sum of all the interior angles of a triangle is always 180 degrees.
Thus, (6x+1) + (5x-17) + (9x-24) = 180.
20x = -40, so x = -2 (answer)
88 * 2 = 176 ;
88 * 3 = 264 ;
88 * 4 = 362 ;
...................