решите уравнения (5 1/7+х)-6 2/3=1 17/21

(5 1/7+х)-6 2/3=1 17/215 1/7+х=1 17/21 +6 2/3х=1 17/21 +6  14/21 -5 1/7х=7 31/21 - 5 3/21х= 2 28/21х=3 7/21х=3 1/3