Answer:
21
Step-by-step explanation:
Note that you are multiplying the values of A, B, & C together, and then subtracting the value of A from it. Plug in the corresponding numbers to the corresponding variables:
ABC - A
(3 * 4 * 2) - 3
(12 * 2) - 3
(24) - 3 = 21
21 is your answer.
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