(12+5i)-(7+3i)=

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Solution for (12+5i)-(7+3i)= equation:


Simplifying
(12 + 5i) + -1(7 + 3i) = 0

Remove parenthesis around (12 + 5i)
12 + 5i + -1(7 + 3i) = 0
12 + 5i + (7 * -1 + 3i * -1) = 0
12 + 5i + (-7 + -3i) = 0

Reorder the terms:
12 + -7 + 5i + -3i = 0

Combine like terms: 12 + -7 = 5
5 + 5i + -3i = 0

Combine like terms: 5i + -3i = 2i
5 + 2i = 0

Solving
5 + 2i = 0

Solving for variable 'i'.

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

Add '-5' to each side of the equation.
5 + -5 + 2i = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 2i = 0 + -5
2i = 0 + -5

Combine like terms: 0 + -5 = -5
2i = -5

Divide each side by '2'.
i = -2.5

Simplifying
i = -2.5

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