Номер 1308 уравнение. Пожалуйста решите умоляю .

Решите задачу:

$1)3(y - 5) - 2(y - 4) = 8 \\ 3y - 15 - 2y + 8 = 8 \\ 3y - 2y = 8 - 8 + 15 \\ y = 15$

$2) - 5(5 - x) - 4x = 18 \\ - 25 + 5x - 4x = 18 \\ 5x - 4x = 18 + 25 \\ x = 43$

$3) \frac{1}{3} (3x - 6) - \frac{2}{7} (7x - 21) = 9 \\ \ x - 2 - 2x + 6 = 9 \\ x - 2x = 9 - 6 + 2 \\ - x = 5 \\ x = 5 \div ( - 1) \\ x = - 5$

$4)5.4(3y - 2) - 7.2(2y - 3) = 1.2 \\ 16.2y - 10.8 - 14.4y + 21.6 = 1.2 \\ 16.2y - 14.4y = 1.2 - 21.6 + 10.8 \\ 1.8y = - 9.6 \\ y = - 9.6 \div 1.8 \\ y = - 5 \frac{1}{3}$