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Simplifying 20(n + 407) = 420 Reorder the terms: 20(407 + n) = 420 (407 * 20 + n * 20) = 420 (8140 + 20n) = 420 Solving 8140 + 20n = 420 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-8140' to each side of the equation. 8140 + -8140 + 20n = 420 + -8140 Combine like terms: 8140 + -8140 = 0 0 + 20n = 420 + -8140 20n = 420 + -8140 Combine like terms: 420 + -8140 = -7720 20n = -7720 Divide each side by '20'. n = -386 Simplifying n = -386
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