z+-90=-168

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Solution for z+-90=-168 equation: 


Simplifying
z + -90 = -168

Reorder the terms:
-90 + z = -168

Solving
-90 + z = -168

Solving for variable 'z'.

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

Add '90' to each side of the equation.
-90 + 90 + z = -168 + 90

Combine like terms: -90 + 90 = 0
0 + z = -168 + 90
z = -168 + 90

Combine like terms: -168 + 90 = -78
z = -78

Simplifying
z = -78

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