(12+3i)-(7+8i)=

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Solution for (12+3i)-(7+8i)= equation:


Simplifying
(12 + 3i) + -1(7 + 8i) = 0

Remove parenthesis around (12 + 3i)
12 + 3i + -1(7 + 8i) = 0
12 + 3i + (7 * -1 + 8i * -1) = 0
12 + 3i + (-7 + -8i) = 0

Reorder the terms:
12 + -7 + 3i + -8i = 0

Combine like terms: 12 + -7 = 5
5 + 3i + -8i = 0

Combine like terms: 3i + -8i = -5i
5 + -5i = 0

Solving
5 + -5i = 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 + -5i = 0 + -5

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

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

Divide each side by '-5'.
i = 1

Simplifying
i = 1

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