Question

14(2Y-3)-5(Y+4)=2(3Y+5)+5Y

Answer 1

14(2у - 3) - 5(у + 4) = 2(3у + 5) + 5у

28у - 42 - 5у - 20 = 6у + 10 + 5у

28у - 5у - 6у - 5у = 10 + 42 + 20

12у = 72

у = 72 : 12

у = 6

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Проверка:

14(2*6 - 3) - 5(6 + 4) = 2(3*6 + 5) + 5*6

14 * 9 - 5 * 10 = 2 * 23 + 30

126 - 50 = 46 + 30

76 = 76

Answer 2

$28y - 42 - 5y - 20 = 6y + 10 + 5y \\ 23y - 62 = 11y + 10 \\ 23y - 11y = 10 + 62 \\ 12y = 72 \\ y = 6$