решите уравнение (х-9 целых 3/7)+5 целых 8/21 = 6 целых 5/14

(х-9 3/7)+5 8/21=6 5/14 (х-9 18/42)+5 16/42=6 15/42 х-9 18/42=6 15/42-5 16/42 х-9 18/42=41/42 х=41/42+ 9 18/42 х=9 59/42 х=10 17/42