Move all terms not containing z to the right side of the equation.
Add 6 to both sides of the equation.
Add -12 and 6.
Divide each term by 2 and simplify.
Divide each term in 2z=-6 by 2.
Cancel the common factor of 2.
Cancel the common factor.
Divide z by 1.
Divide -6 by 2.
Solve for z 2z-6=-12