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Simplifying 21(2 + -1j) + 12j = 44 (2 * 21 + -1j * 21) + 12j = 44 (42 + -21j) + 12j = 44 Combine like terms: -21j + 12j = -9j 42 + -9j = 44 Solving 42 + -9j = 44 Solving for variable 'j'. Move all terms containing j to the left, all other terms to the right. Add '-42' to each side of the equation. 42 + -42 + -9j = 44 + -42 Combine like terms: 42 + -42 = 0 0 + -9j = 44 + -42 -9j = 44 + -42 Combine like terms: 44 + -42 = 2 -9j = 2 Divide each side by '-9'. j = -0.2222222222 Simplifying j = -0.2222222222
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