17x-4x=195

To solve the equation \( 17x - 4x = 195 \), first combine like terms on the left side:

\[ (17 - 4)x = 195 \]

This simplifies to:

\[ 13x = 195 \]

Next, divide both sides by 13 to solve for \( x \):

\[ x = \frac{195}{13} \]

Calculating the division:

\[ x = 15 \]

So the solution is:

\[ x = 15 \]