Найдите корень уравнения: a) (x + 15) – 8 = 17; б) (24 + x) ÷ 21 = 10; в) (45 – y) + 18 = 58; г) (y – 35) + 12 = 32

a) (x + 15) – 8 = 17 x + 15 = 17 + 8 x + 15 = 25 x = 25 – 15 x = 10 б) (24 + x) ÷ 21 = 10 24 + x = 10 × 21 24 + x = 210 x = 210 – 24 x = 186 в) (45 – y) + 18 = 58 45 – y = 58 – 18 45 – y = 40 y = 45 – 40 y = 5 г) (y – 35) + 12 = 32 y – 35 = 32 – 12 y – 35 = 20 y = 20 + 35 y = 55