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Simplifying 7n + -9 = n + 15 Reorder the terms: -9 + 7n = n + 15 Reorder the terms: -9 + 7n = 15 + n Solving -9 + 7n = 15 + 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. -9 + 7n + -1n = 15 + n + -1n Combine like terms: 7n + -1n = 6n -9 + 6n = 15 + n + -1n Combine like terms: n + -1n = 0 -9 + 6n = 15 + 0 -9 + 6n = 15 Add '9' to each side of the equation. -9 + 9 + 6n = 15 + 9 Combine like terms: -9 + 9 = 0 0 + 6n = 15 + 9 6n = 15 + 9 Combine like terms: 15 + 9 = 24 6n = 24 Divide each side by '6'. n = 4 Simplifying n = 4
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