(3+7i)-(3i-4)=

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Solution for (3+7i)-(3i-4)= equation:


Simplifying
(3 + 7i) + -1(3i + -4) = 0

Remove parenthesis around (3 + 7i)
3 + 7i + -1(3i + -4) = 0

Reorder the terms:
3 + 7i + -1(-4 + 3i) = 0
3 + 7i + (-4 * -1 + 3i * -1) = 0
3 + 7i + (4 + -3i) = 0

Reorder the terms:
3 + 4 + 7i + -3i = 0

Combine like terms: 3 + 4 = 7
7 + 7i + -3i = 0

Combine like terms: 7i + -3i = 4i
7 + 4i = 0

Solving
7 + 4i = 0

Solving for variable 'i'.

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

Add '-7' to each side of the equation.
7 + -7 + 4i = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 4i = 0 + -7
4i = 0 + -7

Combine like terms: 0 + -7 = -7
4i = -7

Divide each side by '4'.
i = -1.75

Simplifying
i = -1.75

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