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To solve the equation
\[
-23 = -\frac{3}{2} r,
\]
we can begin by isolating \( r \).
First, we can remove the negative sign from both sides of the equation:
\[
23 = \frac{3}{2} r.
\]
Next, to solve for \( r \), we can multiply both sides by the reciprocal of \(\frac{3}{2}\), which is \(\frac{2}{3}\):
\[
r = 23 \cdot \frac{2}{3}.
\]
Now we can calculate:
\[
r = \frac{23 \cdot 2}{3} = \frac{46}{3}.
\]
Thus, the simplified answer for \( r \) is
\[
\boxed{\frac{46}{3}}.
\]