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Simplifying -1(7 + 9i) = 0 (7 * -1 + 9i * -1) = 0 (-7 + -9i) = 0 Solving -7 + -9i = 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 + -9i = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -9i = 0 + 7 -9i = 0 + 7 Combine like terms: 0 + 7 = 7 -9i = 7 Divide each side by '-9'. i = -0.7777777778 Simplifying i = -0.7777777778
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