40. Найди значения выражений d + 7 и 39 - d при d = 8, d = 9, d = 12, d = 16.

1) d = 8: d + 7 = 8 + 7 = 15 39 - d = 39 - 8 = 31 2) d = 9: d + 7 = 9 + 7 = 16 39 - d = 39 - 9 = 30 3) d = 12: d + 7 = 12 + 7 = 19 39 - d = 39 - 12 = 27 4) d = 16: d + 7 = 16 + 7 = 23 39 - d = 39 - 16 = 23 Ответ: d + 7: 15, 16, 19, 23; 39 - d: 31, 30, 27, 23