Bryan, Flynn and Charlie collected marbles in the ratio of 11 : 7 : 5. After Charlie gave ⁴₅ to Bryan and Flynn, Charlie had 105 less marbles than Bryan. The number of marbles that Flynn had increased by 50%. How many marbles did Bryan and Charlie have in the end?

	Bryan	Flynn	Charlie
Before	11 u	7 u	5 u
Change	+ 0.5 u	+ 3.5 u	- 4 u
After	11.5 u	10.5 u	1 u

Number of marbles that Charlie gave to Bryan and Flynn
= ⁴₅ x 5 u
= 4 u

Number of marbles that Flynn received from Charlie
= ⁵⁰₁₀₀ x 7 u
= 3.5 u

Number of marbles that Bryan received from Charlie
= 4 u - 3.5 u
= 0.5 u

Number of less marbles that Charlie had less than Bryan
= 11.5 u - 1 u 
= 10.5 u

10.5 u = 105

1 u = 105 ÷ 10.5 = 10

Number of marbles that Bryan and Charlie had
= 11.5 u + 1 u
= 12.5 u
= 12.5 x 10
= 125

Answer(s): 125