9*7i=3*(3*-7u)

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Solution for 9*7i=3*(3*-7u) equation: 


Simplifying
9 * 7i = 3(3 * -7u)

Multiply 9 * 7
63i = 3(3 * -7u)

Multiply 3 * -7
63i = 3(-21u)

Remove parenthesis around (-21u)
63i = 3 * -21u

Multiply 3 * -21
63i = -63u

Solving
63i = -63u

Solving for variable 'i'.

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

Divide each side by '63'.
i = -1u

Simplifying
i = -1u

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