Объяснение:
54 - 2(7у+3) - (3у+4) = 54 - 14у - 6 - 3у - 4 = 44 - 17у
44 - 17у = 44 - 17*(4/7) = 44 - 68/7 = 308/7 - 68/7 = 240/7 = 34 2/7
Объяснение:
54 - 2(7у+3) - (3у+4) = 54 - 14у - 6 - 3у - 4 = 44 - 17у
44 - 17у = 44 - 17*(4/7) = 44 - 68/7 = 308/7 - 68/7 = 240/7 = 34 2/7