-3z+-9=-18

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Solution for -3z+-9=-18 equation: 


Simplifying
-3z + -9 = -18

Reorder the terms:
-9 + -3z = -18

Solving
-9 + -3z = -18

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 = -18 + 9

Combine like terms: -9 + 9 = 0
0 + -3z = -18 + 9
-3z = -18 + 9

Combine like terms: -18 + 9 = -9
-3z = -9

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

Simplifying
z = 3

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