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:

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

Now, divide both sides by 3 to solve for \( n \):

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

So the solution is:

\[ n = 62 \]