SOLUTION: The perimeter of a trapezoid is 39a-7. Three sides have the following lengths: 9a, 5a+1, and 17a-6. What is the length of the fourth side. (sorry if the topic/category is incorrect

Algebra ->  Formulas -> SOLUTION: The perimeter of a trapezoid is 39a-7. Three sides have the following lengths: 9a, 5a+1, and 17a-6. What is the length of the fourth side. (sorry if the topic/category is incorrect      Log On


   

Question 1110126: The perimeter of a trapezoid is 39a-7. Three sides have the following lengths: 9a, 5a+1, and 17a-6. What is the length of the fourth side. (sorry if the topic/category is incorrect)
Answer by josgarithmetic(39621) About Me  (Show Source):
You can put this solution on YOUR website!
Unknown side, x.

9a%2B%285a%2B1%29%2B%2817a-6%29%2Bx=39a-7;
Solve this for x, in terms of a.