Question

HELP PLEASE! 10 PTS!

The sum of interior angles in a quadrilateral is equal to three hundred sixty. Find value of x.

x = ____

Answer 1

The Answer is: x = 29

Explanation:

Put all of the angles equal to 360 degrees:

(5x - 8) + (3x + 4) + 89 + 51 = 360

Collect like terms and solve for x:

5x + 3x - 8 + 4 + 89 + 51 = 360

8x - 4 + 140 = 360

8x + 136 = 360

8x = 224

x = 224/8 = 28

*** Corrected 12/272019 *** Thanks to the Moderator!