(12+5i)-(2-i)=

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Solution for (12+5i)-(2-i)= equation:


Simplifying
(12 + 5i) + -1(2 + -1i) = 0

Remove parenthesis around (12 + 5i)
12 + 5i + -1(2 + -1i) = 0
12 + 5i + (2 * -1 + -1i * -1) = 0
12 + 5i + (-2 + 1i) = 0

Reorder the terms:
12 + -2 + 5i + 1i = 0

Combine like terms: 12 + -2 = 10
10 + 5i + 1i = 0

Combine like terms: 5i + 1i = 6i
10 + 6i = 0

Solving
10 + 6i = 0

Solving for variable 'i'.

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

Add '-10' to each side of the equation.
10 + -10 + 6i = 0 + -10

Combine like terms: 10 + -10 = 0
0 + 6i = 0 + -10
6i = 0 + -10

Combine like terms: 0 + -10 = -10
6i = -10

Divide each side by '6'.
i = -1.666666667

Simplifying
i = -1.666666667

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