4. The difference between two rational numbers is -371.52. If the decimal point of the minuend is moved one place to the left, the subtrahend is obtained. What is the minuend, and what is the subtrahend?
First solution.

Let $x$ be the subtrahend.

$1 \text{POINT}$

If the subtrahend is obtained by moving the decimal point of the minuend one place to the left, then the minuend is $10 x$.

$1 \text{POINT}$

$$
\begin{gathered}
10 x - x = -371.52 \\
9 x = -371.52 \\
x = -41.28 \\
10 x = -412.8
\end{gathered}
$$

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