Question

Find measure of angle EFG

Answer 1

102degree if you want to know the detail just ask me

Answer 2

First, you know that angle EFG is 17x degrees 
You also know from the supplementary angles that 17x+13x should be equal to 180. 

So, 
17x+13x=180 
30x=180 
x=180/30 
x=6 

Therefore 17(6)= 102 degrees 

Hope I helped :)