z+4=z-8

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Solution for z+4=z-8 equation: 


Simplifying
z + 4 = z + -8

Reorder the terms:
4 + z = z + -8

Reorder the terms:
4 + z = -8 + z

Add '-1z' to each side of the equation.
4 + z + -1z = -8 + z + -1z

Combine like terms: z + -1z = 0
4 + 0 = -8 + z + -1z
4 = -8 + z + -1z

Combine like terms: z + -1z = 0
4 = -8 + 0
4 = -8

Solving
4 = -8

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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