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 .

Apply the distributive property.

Multiply by .

Apply the distributive property.

Multiply by .

Multiply .

Multiply by .

Multiply by .

Multiply by .

Subtract from both sides of the equation.

Subtract from .

Solve for z 2=(10+z)/-3