Question

If the quadrilateral below is a trapezoid, find: x=

Answer 1

x=4

Explanation:

Consecutive sides in a trapezoid are supplementry, which means they add up to 180. So, your equation is 14x-15+139=180

14x+124=180 (first make the numbers as clean as you can on both sides)

14x=56 (move all of the numbers to one side, so subtract 124 from both sides)

x=4 (simplify to get your answer, so divide by 14)

(hope this helps :P)