7=-7(i-9)

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Solution for 7=-7(i-9) equation:


Simplifying
7 = -7(i + -9)

Reorder the terms:
7 = -7(-9 + i)
7 = (-9 * -7 + i * -7)
7 = (63 + -7i)

Solving
7 = 63 + -7i

Solving for variable 'i'.

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

Add '7i' to each side of the equation.
7 + 7i = 63 + -7i + 7i

Combine like terms: -7i + 7i = 0
7 + 7i = 63 + 0
7 + 7i = 63

Add '-7' to each side of the equation.
7 + -7 + 7i = 63 + -7

Combine like terms: 7 + -7 = 0
0 + 7i = 63 + -7
7i = 63 + -7

Combine like terms: 63 + -7 = 56
7i = 56

Divide each side by '7'.
i = 8

Simplifying
i = 8

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