Rewrite the equation as 9+3z=y.
Subtract 9 from both sides of the equation.
Divide each term by 3 and simplify.
Divide each term in 3z=y-9 by 3.
Cancel the common factor of 3.
Cancel the common factor.
Divide z by 1.
Divide -9 by 3.
Solve for z y=9+3z