Question 31254
1. x/16 + 5/8 = 1
   x/16 + 10/16 = 1(=16/16)
   then, x+10 = 16 so, x=6

2. multiply x in every term to get rid of x in denominator.
   so, 20-6x/7 = 2x   20=2x+(6x/7)
                        =(14x+6x)/7
                        =20x/7
   x should be 7 because 20=20 times 7/7