z-15=-20

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Solution for z-15=-20 equation: 


Simplifying
z + -15 = -20

Reorder the terms:
-15 + z = -20

Solving
-15 + z = -20

Solving for variable 'z'.

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

Add '15' to each side of the equation.
-15 + 15 + z = -20 + 15

Combine like terms: -15 + 15 = 0
0 + z = -20 + 15
z = -20 + 15

Combine like terms: -20 + 15 = -5
z = -5

Simplifying
z = -5

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