18n-12n-3n=186

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

\[ (18n - 12n - 3n) = 186 \]

Calculating the left side:

\[ (18 - 12 - 3)n = 186 \]

This simplifies to:

\[ 3n = 186 \]

Next, to isolate \( n \), divide both sides by 3:

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

Calculating the right side:

\[ n = 62 \]

Thus, the solution is:

\[ n = 62 \]