G7.4 Find the least value of $d$, if $\left|\frac{3-2 d}{5}+2\right| \leq 3$.
$$
\begin{array}{l}
-3 \leq \frac{3-2 d}{5}+2 \leq 3 \\
\Leftrightarrow-5 \leq \frac{3-2 d}{5} \leq 1 \\
\Leftrightarrow-25 \leq 3-2 d \leq 5 \\
\Leftrightarrow-28 \leq-2 d \leq 2 \\
\Leftrightarrow 14 \geq d \geq-1
\end{array}
$$

The least value of $d=-1$