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Simplifying (1 + -3i) + -1(-3 + 7i) = 0 Remove parenthesis around (1 + -3i) 1 + -3i + -1(-3 + 7i) = 0 1 + -3i + (-3 * -1 + 7i * -1) = 0 1 + -3i + (3 + -7i) = 0 Reorder the terms: 1 + 3 + -3i + -7i = 0 Combine like terms: 1 + 3 = 4 4 + -3i + -7i = 0 Combine like terms: -3i + -7i = -10i 4 + -10i = 0 Solving 4 + -10i = 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 + -10i = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -10i = 0 + -4 -10i = 0 + -4 Combine like terms: 0 + -4 = -4 -10i = -4 Divide each side by '-10'. i = 0.4 Simplifying i = 0.4
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