If the binary operation ' \( * \) ' on \( \mathbf{I} \) is defined by \( a * b=2 a-3 b \), then ... VIDEO
If the binary operation ' \( * \) ' on \( \mathbf{I} \) is defined by \( a * b=2 a-3 b \), then find
\[
7 * 3
\]
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