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

x=4

Step-by-step 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)

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3