Решите уравнение (1 2/3х + 6 5/42) : 2 3/4 =3 1/11

Спасибо

( 1 ( 2/3 ) x + 6 ( 5/42 )) : 2 ( 3/4 ) = 3 ( 1/11 ) ( ( 5/3 )x + ( 257/42 )) = ( 34/11 ) * ( 11/4 ) ( 5/3 ) x = ( 17/2 ) - ( 257/42 ) ( 5/3 ) x = ( 357/42 ) - ( 257/42 ) ( 5/3 ) x = 100/42 X = ( 50/21 ) : ( 5/3 ) X = 30/21 X = 1 ( 9/21 ) X = 1 ( 3/7 )