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

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

Multiply and .

Multiply and .

Reorder the factors of .

Combine the numerators over the common denominator.

Apply the distributive property.

Multiply by .

Apply the distributive property.

Multiply by .

Add and .

Add and .

Simplify 3/(x+7)+4/(x-8)