Ответ:Решение:\( 82 - 74 = 8 \)\( 63 - 27 = 36 \)\( 8 : 2 = 4 \)\( 36 : 4 = 9 \)\( 4 \times 7 = 28 \)\( 28 + 7 = 35 \)\( 35 - 4 = 31 \)\( 31 - 19 = 12 \)\( 12 + 9 = 21 \)Ответ: 21.