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Simplifying 2j + -1j + -1 = 18 Reorder the terms: -1 + 2j + -1j = 18 Combine like terms: 2j + -1j = 1j -1 + 1j = 18 Solving -1 + 1j = 18 Solving for variable 'j'. Move all terms containing j to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + 1j = 18 + 1 Combine like terms: -1 + 1 = 0 0 + 1j = 18 + 1 1j = 18 + 1 Combine like terms: 18 + 1 = 19 1j = 19 Divide each side by '1'. j = 19 Simplifying j = 19

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