To solve the equation \( 23(x - 4) = -10 \) and find the reciprocal of the coefficient \( 23 \), we first identify what the reciprocal of \( 23 \) is.
The reciprocal of a number \( a \) is \( \frac{1}{a} \). Therefore, the reciprocal of \( 23 \) is:
\[ \frac{1}{23} \]
So, Izzy would multiply both sides of the equation by \( \frac{1}{23} \) to eliminate the coefficient on the left side.