30=3z-9

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Solution for 30=3z-9 equation:


Simplifying
30 = 3z + -9

Reorder the terms:
30 = -9 + 3z

Solving
30 = -9 + 3z

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '-3z' to each side of the equation.
30 + -3z = -9 + 3z + -3z

Combine like terms: 3z + -3z = 0
30 + -3z = -9 + 0
30 + -3z = -9

Add '-30' to each side of the equation.
30 + -30 + -3z = -9 + -30

Combine like terms: 30 + -30 = 0
0 + -3z = -9 + -30
-3z = -9 + -30

Combine like terms: -9 + -30 = -39
-3z = -39

Divide each side by '-3'.
z = 13

Simplifying
z = 13

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