18n-12n-3n=186

To solve the equation \( 18n - 12n - 3n = 186 \), we can combine like terms on the left side.

First, combine \( 18n \), \( -12n \), and \( -3n \):

\[ 18n - 12n - 3n = (18 - 12 - 3)n = 3n \]

So the equation simplifies to:

\[ 3n = 186 \]

Next, we can solve for \( n \) by dividing both sides by 3:

\[ n = \frac{186}{3} = 62 \]

Thus, the solution is:

\[ n = 62 \]