5 7 12 4 9 July 8, 2019 16 32 64 128 4x 1 12 7 4 5 x 9 3 целых 5/12 + 4 целых 7/9 7 12 x 5 18 2 4 9 5 7 12 m 2 4 9 5 4 12 9 and 7 common denominators 7 x 9 5 12 4 2 Average of 4 7 12 5 9 Lcm of 5 4 12 9 7 5 12 x 4 9 là 7 thì x là