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Simplifying 9 = 7n + -12 Reorder the terms: 9 = -12 + 7n Solving 9 = -12 + 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. 9 + -7n = -12 + 7n + -7n Combine like terms: 7n + -7n = 0 9 + -7n = -12 + 0 9 + -7n = -12 Add '-9' to each side of the equation. 9 + -9 + -7n = -12 + -9 Combine like terms: 9 + -9 = 0 0 + -7n = -12 + -9 -7n = -12 + -9 Combine like terms: -12 + -9 = -21 -7n = -21 Divide each side by '-7'. n = 3 Simplifying n = 3
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