Решите уравнения: a) (x + 15) - 8 = 17; б) (24 + x) - 21 = 10; в) (45 - y) + 18 = 58; г) (y - 85) + 12 = 32; д) 56 - (x + 12) = 24; е) 55 - (x - 15) = 30.

a) x + 15 - 8 = 17 → x + 7 = 17 → x = 10, б) 24 + x - 21 = 10 → x + 3 = 10 → x = 7, в) 45 - y + 18 = 58 → 63 - y = 58 → y = 5, г) y - 85 + 12 = 32 → y - 73 = 32 → y = 105, д) 56 - (x + 12) = 24 → 56 - x - 12 = 24 → 44 - x = 24 → x = 20, е) 55 - (x - 15) = 30 → 55 - x + 15 = 30 → 70 - x = 30 → x = 40.