(12+5i)-(8+i)=

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Solution for (12+5i)-(8+i)= equation:


Simplifying
(12 + 5i) + -1(8 + i) = 0

Remove parenthesis around (12 + 5i)
12 + 5i + -1(8 + i) = 0
12 + 5i + (8 * -1 + i * -1) = 0
12 + 5i + (-8 + -1i) = 0

Reorder the terms:
12 + -8 + 5i + -1i = 0

Combine like terms: 12 + -8 = 4
4 + 5i + -1i = 0

Combine like terms: 5i + -1i = 4i
4 + 4i = 0

Solving
4 + 4i = 0

Solving for variable 'i'.

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

Add '-4' to each side of the equation.
4 + -4 + 4i = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 4i = 0 + -4
4i = 0 + -4

Combine like terms: 0 + -4 = -4
4i = -4

Divide each side by '4'.
i = -1

Simplifying
i = -1

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