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Simplifying 420 = 120i Solving 420 = 120i Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Add '-120i' to each side of the equation. 420 + -120i = 120i + -120i Combine like terms: 120i + -120i = 0 420 + -120i = 0 Add '-420' to each side of the equation. 420 + -420 + -120i = 0 + -420 Combine like terms: 420 + -420 = 0 0 + -120i = 0 + -420 -120i = 0 + -420 Combine like terms: 0 + -420 = -420 -120i = -420 Divide each side by '-120'. i = 3.5 Simplifying i = 3.5
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