Let x be the half Gittas' age. Then Gittas age is 2x, while Kendra's age is (x+6). Also, we are given that (x+6) + 2x = 57, or 3x = 57 - 6 = 51. Hence, x = = 17. Thus Gittas' age is 2*17 = 34 years, while Kendra's age is 17+6 = 23 years.