123. Решите уравнение: 1) 7(x - 5) = 63; 2) 24(x + 15) = 432; 3) 14(3x - 15) = 252; 4) 8(112 - 5x) = 816.

1) 7(x - 5) = 63. x - 5 = 63 / 7 = 9. x = 9 + 5 = 14; 2) 24(x + 15) = 432. x + 15 = 432 / 24 = 18. x = 18 - 15 = 3; 3) 14(3x - 15) = 252. 3x - 15 = 252 / 14 = 18. 3x = 18 + 15 = 33. x = 33 / 3 = 11; 4) 8(112 - 5x) = 816. 112 - 5x = 816 / 8 = 102. -5x = 102 - 112 = -10. x = -10 / -5 = 2.