Solve the linear equations. `n/2 - (3 n)/4 + (5 n)/6 = 21`

Explanation

To solve the linear equation \( \frac{n}{2} - \frac{3n}{4} + \frac{5n}{6} = 21 \), we will follow these steps:

### Step 1: Find the Least Common Multiple (LCM)
The denominators in the equation are 2, 4, and 6. The LCM of these numbers is 12.

**Hint:** To find the LCM, list the multiples of each number until you find the smallest common multiple.

### Step 2: Multiply the entire equation by the LCM
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