Решение уровнений пж фото есть вверху

Решите задачу:

$14.(4289 - a) + 5637 = 8001 \\ 4289 - a = 8001 - 5637 = 2364 \\ a = 4289 - 2364 = 1925 \\ a = 1925 \\ \\ 15.(x - 8365) \div 6 = 2108 \\ x - 8365 = 2108 \times 6 = 12648 \\ x = 12648 + 8365 = 21013 \\ x = 21013 \\ \\ 16. \: 7 \times (4217 - b) = 9163 \\ 4217 - b = 9163 \div 7 = 1309 \\ b = 4217 - 1309 = 2908 \\ b = 2908 \\ \\ 17. \: 75 \times x + 8567 = 17867 \\ 75 \times x = 9300 \\ x = 9300 \div 75 = 124 \\ x = 124 \\ \\ 18.(x + 836) \times 24 = 21888 \\ x + 836 = 21888 \div 24 = 912 \\ x = 912 - 836 = 76 \\ x = 76 \\ \\ 19. \: x \times 27 - 1537 = 6725 \\ x \times 27 = 6725 + 1537 = 8262 \\ x =8262 \div 27 = 306 \\ x = 306 \\ \\ 20. \: 10000 - 3105 \div x = 9931 \\ 3105 \div x = 10000 - 9931 = 69 \\ x = 3105 \div 69 = 45 \\ x = 45$