Interchange the variables.

Rewrite the equation as .

Multiply both sides of the equation by .

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Add to both sides of the equation.

Replace the with to show the final answer.

Set up the composite result function.

Evaluate by substituting in the value of into .

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Combine the opposite terms in .

Add and .

Add and .

Since , is the inverse of .

Find the Inverse (x-3)/7