The LCM is: 429
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The Least Common Multiple (LCM) of 12, 26, and 39 is 156.
The least common denominator of 3 and 13 is 39.
The factors of 39 are the numbers that can be evenly divided into 39 without leaving a remainder. The factors of 39 are 1, 3, 13, and 39. The prime factors of 39 are the prime numbers that multiply together to give the original number. In this case, the prime factors of 39 are 3 and 13.
2x + 6 + 9x = 39 11x + 6 = 39 11x = 39 - 6 11x = 33 x = 3
The GCF is 39.