6i-9=21

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Solution for 6i-9=21 equation: 


Simplifying
6i + -9 = 21

Reorder the terms:
-9 + 6i = 21

Solving
-9 + 6i = 21

Solving for variable 'i'.

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

Add '9' to each side of the equation.
-9 + 9 + 6i = 21 + 9

Combine like terms: -9 + 9 = 0
0 + 6i = 21 + 9
6i = 21 + 9

Combine like terms: 21 + 9 = 30
6i = 30

Divide each side by '6'.
i = 5

Simplifying
i = 5

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