Solve the following equations:
`5x+15=20`

Answer

To solve the equation \( 5x + 15 = 20 \), we will follow these steps:

### Step 1: Write down the equation
We start with the given equation:
\[ 5x + 15 = 20 \]

### Step 2: Subtract 15 from both sides
To isolate the term with \( x \), we need to eliminate the constant on the left side. We do this by subtracting 15 from both sides of the equation:
\[ 5x + 15 - 15 = 20 - 15 \]
This simplifies to:
\[ 5x = 5 \]

### Step 3: Divide both sides by 5
Now, we need to solve for \( x \). We do this by dividing both sides of the equation by 5:
\[ \frac{5x}{5} = \frac{5}{5} \]
This simplifies to:
\[ x = 1 \]

### Final Answer
Thus, the solution to the equation \( 5x + 15 = 20 \) is:
\[ x = 1 \]

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