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Simplifying (7 + -4i) + (9 + 6i) = 0 Remove parenthesis around (7 + -4i) 7 + -4i + (9 + 6i) = 0 Remove parenthesis around (9 + 6i) 7 + -4i + 9 + 6i = 0 Reorder the terms: 7 + 9 + -4i + 6i = 0 Combine like terms: 7 + 9 = 16 16 + -4i + 6i = 0 Combine like terms: -4i + 6i = 2i 16 + 2i = 0 Solving 16 + 2i = 0 Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Add '-16' to each side of the equation. 16 + -16 + 2i = 0 + -16 Combine like terms: 16 + -16 = 0 0 + 2i = 0 + -16 2i = 0 + -16 Combine like terms: 0 + -16 = -16 2i = -16 Divide each side by '2'. i = -8 Simplifying i = -8
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