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Simplifying 15 = 7 + -4n Solving 15 = 7 + -4n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '4n' to each side of the equation. 15 + 4n = 7 + -4n + 4n Combine like terms: -4n + 4n = 0 15 + 4n = 7 + 0 15 + 4n = 7 Add '-15' to each side of the equation. 15 + -15 + 4n = 7 + -15 Combine like terms: 15 + -15 = 0 0 + 4n = 7 + -15 4n = 7 + -15 Combine like terms: 7 + -15 = -8 4n = -8 Divide each side by '4'. n = -2 Simplifying n = -2
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