124. Найдите корень уравнения: 1) 13x + 4x = 408; 2) 47x - 15x = 2144; 3) a + 23a = 1032; 4) 16x - x + 14 = 299; 5) 7b + 6b - 29 = 374; 6) 19y - 12y - 47 = 1388.

1) 13x + 4x = 408. 17x = 408. x = 408 / 17 = 24; 2) 47x - 15x = 2144. 32x = 2144. x = 2144 / 32 = 67; 3) a + 23a = 1032. 24a = 1032. a = 1032 / 24 = 43; 4) 16x - x + 14 = 299. 15x = 299 - 14 = 285. x = 285 / 15 = 19; 5) 7b + 6b - 29 = 374. 13b = 374 + 29 = 403. b = 403 / 13 = 31; 6) 19y - 12y - 47 = 1388. 7y = 1388 + 47 = 1435. y = 1435 / 7 = 205.