Question

The ratio of Bills money to Henry's money was 5:6 After Bill spent $800 on a TV set, the ratio became 1:2. How much money did Bill have at first?

Answer 1

b/h = 5/6 is 6b = 5h
(b-800)/h = 1/2

Answer 2

6b = 5h
h = 2b - 1600

6b = 5(2b - 1600)
b = 2000

Answer 3

set both equations up as ratios and then cross multiply
using substitution you can find B