Subtract from both sides of the equation.

Subtract from .

Subtract from both sides of the equation.

Subtract from .

Divide each term in by .

Cancel the common factor of .

Cancel the common factor.

Divide by .

Dividing two negative values results in a positive value.

The result can be shown in multiple forms.

Exact Form:

Decimal Form:

Solve for z 20-8*z=15+z