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Simplifying (7 + 7i) + -1(2 + 5i) = 0 Remove parenthesis around (7 + 7i) 7 + 7i + -1(2 + 5i) = 0 7 + 7i + (2 * -1 + 5i * -1) = 0 7 + 7i + (-2 + -5i) = 0 Reorder the terms: 7 + -2 + 7i + -5i = 0 Combine like terms: 7 + -2 = 5 5 + 7i + -5i = 0 Combine like terms: 7i + -5i = 2i 5 + 2i = 0 Solving 5 + 2i = 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 + 2i = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 2i = 0 + -5 2i = 0 + -5 Combine like terms: 0 + -5 = -5 2i = -5 Divide each side by '2'. i = -2.5 Simplifying i = -2.5
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