-15z-(-18z)=-9

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Solution for -15z-(-18z)=-9 equation: 


Simplifying
-15z + -1(-18z) = -9

Remove parenthesis around (-18z)
-15z + -1 * -18z = -9

Multiply -1 * -18
-15z + 18z = -9

Combine like terms: -15z + 18z = 3z
3z = -9

Solving
3z = -9

Solving for variable 'z'.

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

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

Simplifying
z = -3

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