Rewrite the equation as .

Multiply both sides of the equation by .

Simplify .

Cancel the common factor of .

Factor out of .

Factor out of .

Cancel the common factor.

Rewrite the expression.

Simplify the expression.

Move the negative one from the denominator of .

Rewrite as .

Multiply .

Multiply by .

Multiply by .

Multiply by .

Solve for a 4=a/-7