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Simplifying 420 = n * 2 + -1 Reorder the terms for easier multiplication: 420 = 2n + -1 Reorder the terms: 420 = -1 + 2n Solving 420 = -1 + 2n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-2n' to each side of the equation. 420 + -2n = -1 + 2n + -2n Combine like terms: 2n + -2n = 0 420 + -2n = -1 + 0 420 + -2n = -1 Add '-420' to each side of the equation. 420 + -420 + -2n = -1 + -420 Combine like terms: 420 + -420 = 0 0 + -2n = -1 + -420 -2n = -1 + -420 Combine like terms: -1 + -420 = -421 -2n = -421 Divide each side by '-2'. n = 210.5 Simplifying n = 210.5
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