66-2*(7у+3)-(3у+4) при 4/7

Question

66-2*(7у+3)-(3у+4) при 4/7

Answer 1

66 -2(7у+3)-(3у+4)=66-14у-6-3у-4=56 - 18у

при у=4/7
56 - 18*4/7=56 - 10 2/7=45 5/7

Answer 2

66-8-6-12/7-4=462-56-42-12-28  /   7   =  324/7=46 ЦЕЛЫХ  2/7