3z-9=-15

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Solution for 3z-9=-15 equation: 


Simplifying
3z + -9 = -15

Reorder the terms:
-9 + 3z = -15

Solving
-9 + 3z = -15

Solving for variable 'z'.

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

Add '9' to each side of the equation.
-9 + 9 + 3z = -15 + 9

Combine like terms: -9 + 9 = 0
0 + 3z = -15 + 9
3z = -15 + 9

Combine like terms: -15 + 9 = -6
3z = -6

Divide each side by '3'.
z = -2

Simplifying
z = -2

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