2021 JMPSC Accuracy Problems/Problem 7

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Problem

If $A$, $B$, and $C$ each represent a single digit and they satisfy the equation \[\begin{array}{cccc}& A & B & C \\ \times & &  &3 \\ \hline  & 7 & 9 & C\end{array},\] find $3A+2B+C$.

Solution