There is such a number that if the whole of it and 1/7 of it was added the answer would be 19 what is the orginal no

x + 1/7x = 19

8/7 x = 19

x = 19 (7/8) = 133/8  = 16 5/8

You make an equation : x + 1/7 x = 19
combine terms : 8*x/7=19

multiply both sides by 7 :   8x = 19*7

devide both sides by 8   : x=19*7/8

solve for x :) x = 16.625