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Simplifying 20 + -2n = 15 + -7n Solving 20 + -2n = 15 + -7n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '7n' to each side of the equation. 20 + -2n + 7n = 15 + -7n + 7n Combine like terms: -2n + 7n = 5n 20 + 5n = 15 + -7n + 7n Combine like terms: -7n + 7n = 0 20 + 5n = 15 + 0 20 + 5n = 15 Add '-20' to each side of the equation. 20 + -20 + 5n = 15 + -20 Combine like terms: 20 + -20 = 0 0 + 5n = 15 + -20 5n = 15 + -20 Combine like terms: 15 + -20 = -5 5n = -5 Divide each side by '5'. n = -1 Simplifying n = -1
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