(15+x)*14=252

To solve the equation \((15+x) \cdot 14 = 252\), you can follow these steps:

1. First, divide both sides of the equation by 14 to isolate the term with \(x\):

\[ 15 + x = \frac{252}{14} \]

2. Calculate \(\frac{252}{14}\):

\[ \frac{252}{14} = 18 \]

3. Now the equation simplifies to:

\[ 15 + x = 18 \]

4. Next, subtract 15 from both sides to find \(x\):

\[ x = 18 - 15 \]

5. Finally, calculate the value:

\[ x = 3 \]

Thus, the solution is \(x = 3\).