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Simplifying 20 = 7n + 2 + -3 Reorder the terms: 20 = 2 + -3 + 7n Combine like terms: 2 + -3 = -1 20 = -1 + 7n Solving 20 = -1 + 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 + -7n = -1 + 7n + -7n Combine like terms: 7n + -7n = 0 20 + -7n = -1 + 0 20 + -7n = -1 Add '-20' to each side of the equation. 20 + -20 + -7n = -1 + -20 Combine like terms: 20 + -20 = 0 0 + -7n = -1 + -20 -7n = -1 + -20 Combine like terms: -1 + -20 = -21 -7n = -21 Divide each side by '-7'. n = 3 Simplifying n = 3
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