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Simplifying 4n + -8 = n + 21 Reorder the terms: -8 + 4n = n + 21 Reorder the terms: -8 + 4n = 21 + n Solving -8 + 4n = 21 + n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1n' to each side of the equation. -8 + 4n + -1n = 21 + n + -1n Combine like terms: 4n + -1n = 3n -8 + 3n = 21 + n + -1n Combine like terms: n + -1n = 0 -8 + 3n = 21 + 0 -8 + 3n = 21 Add '8' to each side of the equation. -8 + 8 + 3n = 21 + 8 Combine like terms: -8 + 8 = 0 0 + 3n = 21 + 8 3n = 21 + 8 Combine like terms: 21 + 8 = 29 3n = 29 Divide each side by '3'. n = 9.666666667 Simplifying n = 9.666666667
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