Ryan and Fred have some silver notebooks and some white notebooks. The number of white notebooks Ryan has is equal to the number of silver notebooks Fred has. ²₃ of Ryan's notebooks are silver and ¹₄ of Fred's notebooks are white. There are a total of 81 silver notebooks. Find the total number of notebooks they have.

Ryan		Fred		Total
Silver	White	Silver	White
	1x3	1x3
2x3	1x3	3x1	1x1
6 u	3 u	3 u	1 u	13 u

The number of Ryan's white notebooks and Fred's silver notebooks is the same.

The number of Ryan's white notebooks is repeated. The number of Fred's silver notebooks is repeated.  Make the number of Ryan's white notebooks and Fred's silver notebooks the same.  LCM of 1 and 3 is 3.

Number of silver notebooks
= 6 u + 3 u
= 9 u

9 u = 81

1 u = 81 ÷ 9 = 9

Total number of notebooks
= 6 u + 3 u + 3 u + 1 u
= 13 u
= 13 x 9
= 117

Answer(s): 117