A mystery number increased by 15 is 48

Question

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Let's solve the problem step by step.

**Problem Statement:**
A mystery number increased by 15 is 48.

**Let's define the mystery number as:**  
$$ x $$

**According to the problem:**
$$ x + 15 = 48 $$

**To find $$ x $$, subtract 15 from both sides of the equation:**
$$
\begin{align*}
x + 15 &= 48 \
x &= 48 - 15 \
x &= 33
\end{align*}
$$

**Answer:**  
The mystery number is **33**.
The mystery number is 33.

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