9
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8 - (42/7) + (7 x 3) = 23
== == 7/12 - 11/12 = -4/12 or -1/3.
It is: (15-7)*(12-9) = 24
Subtract two, multiply by two, subtract one. :)
The sequence alternates between multiplying by 2 and then subtracting 3. Starting with 5, you multiply by 2 to get 10, then subtract 3 to get 7, multiply by 2 to get 14, subtract 3 to get 11, multiply by 2 to get 22, and subtract 3 to get 19. Following this pattern, the next operation is to multiply 19 by 2, resulting in 38. Therefore, the next number in the series is 38.