21+3i=0

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Solution for 21+3i=0 equation: 


Simplifying
21 + 3i = 0

Solving
21 + 3i = 0

Solving for variable 'i'.

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

Add '-21' to each side of the equation.
21 + -21 + 3i = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 3i = 0 + -21
3i = 0 + -21

Combine like terms: 0 + -21 = -21
3i = -21

Divide each side by '3'.
i = -7

Simplifying
i = -7

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