z+I=0

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Solution for z+I=0 equation: 


Simplifying
z + I = 0

Reorder the terms:
I + z = 0

Solving
I + z = 0

Solving for variable 'I'.

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

Add '-1z' to each side of the equation.
I + z + -1z = 0 + -1z

Combine like terms: z + -1z = 0
I + 0 = 0 + -1z
I = 0 + -1z
Remove the zero:
I = -1z

Simplifying
I = -1z

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