Interchange the variables.

Rewrite the equation as .

Solve for .

Multiply each term by and simplify.

Multiply each term in by .

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Simplify .

Apply the distributive property.

Move to the left of .

Subtract from both sides of the equation.

Factor out of .

Factor out of .

Factor out of .

Factor out of .

Divide each term by and simplify.

Divide each term in by .

Cancel the common factor of .

Cancel the common factor.

Divide by .

Replace the with to show the final answer.

Set up the composite result function.

Evaluate by substituting in the value of into .

Combine and .

Simplify the denominator.

To write as a fraction with a common denominator, multiply by .

Combine the numerators over the common denominator.

Reorder terms.

Rewrite in a factored form.

Factor out of .

Factor out of .

Factor out of .

Add and .

Add and .

Multiply by .

Multiply by .

Multiply the numerator by the reciprocal of the denominator.

Cancel the common factor of .

Factor out of .

Cancel the common factor.

Rewrite the expression.

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Since , is the inverse of .

Find the Inverse (2x)/(x+7)