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Simplifying 7n + -5 = 21 + -5n Reorder the terms: -5 + 7n = 21 + -5n Solving -5 + 7n = 21 + -5n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '5n' to each side of the equation. -5 + 7n + 5n = 21 + -5n + 5n Combine like terms: 7n + 5n = 12n -5 + 12n = 21 + -5n + 5n Combine like terms: -5n + 5n = 0 -5 + 12n = 21 + 0 -5 + 12n = 21 Add '5' to each side of the equation. -5 + 5 + 12n = 21 + 5 Combine like terms: -5 + 5 = 0 0 + 12n = 21 + 5 12n = 21 + 5 Combine like terms: 21 + 5 = 26 12n = 26 Divide each side by '12'. n = 2.166666667 Simplifying n = 2.166666667
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