Simplify each term.

Combine and .

Combine the numerators over the common denominator.

Combine and .

Move the negative in front of the fraction.

Combine the numerators over the common denominator.

Apply the distributive property.

Multiply by .

Multiply by .

Add and .

Factor out of .

Rewrite as .

Factor out of .

Simplify the expression.

Rewrite as .

Move the negative in front of the fraction.

Combine 1/7-3(3/7n-2/7)