Area= (length)(width)
divide by (length) on both sides.
(width)= (area)/(length).
Your best bet is treating area, length, and width as numbers. You can plug in numbers and take them out in the end. Hope this helps!
I could help you if you label which one is the length which one it the width and which one is the height.
You would be 29.
2017-1988= 29
The formula of a trapezoid is a plus 2 over 2 times the height. you need the height first to find the trapezoids area.
