It is 42
LCD(6, 8) = 24
21
LCD(7,9,13) = 7*9*13 which is 819
The LCD of x, 5, 7, 15 is 105x.
The factors of 42 are 1, 2, 3, 6, 7, 14, 21 and 42. The factor pairs of 42 are 1 x 42, 2 x 21, 3 x 14, and 6 x 7.1, 2, 3, 6, 7, 14, 21, 42.1 2 3 6 7 21 14 42
The LCD of 6 and 7 is 42
21
21.
LCD is 24
LCD(8, 21, 7) = 168.
Put as 6/7 - 4/21, change to LCD: 18/21 - 4/21, which is 14/21, or 2/3
21
The LCD of 6, 5, and 7 is 210.
126
42 is the least common denominator for 21 and 6
It is 42
42