9i-4(i+2)=

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Solution for 9i-4(i+2)= equation:


Simplifying
9i + -4(i + 2) = 0

Reorder the terms:
9i + -4(2 + i) = 0
9i + (2 * -4 + i * -4) = 0
9i + (-8 + -4i) = 0

Reorder the terms:
-8 + 9i + -4i = 0

Combine like terms: 9i + -4i = 5i
-8 + 5i = 0

Solving
-8 + 5i = 0

Solving for variable 'i'.

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

Add '8' to each side of the equation.
-8 + 8 + 5i = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 5i = 0 + 8
5i = 0 + 8

Combine like terms: 0 + 8 = 8
5i = 8

Divide each side by '5'.
i = 1.6

Simplifying
i = 1.6

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