Hi

Given trapezoid ABCD with median line EF, find the value of x. 

ab= 2x+2 

ef= 17 

dc= 5x-10

 If I am understanding Your question properly:

(ab + dc)/2 = ef

 [(2x+2)+(5x-10)]/2 = 17

 [(2x+2)+(5x-10)] = 34 

     7x =  42

      x = 6

 

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