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Simplifying 1 + 7n = 4n + 5n + 1 Reorder the terms: 1 + 7n = 1 + 4n + 5n Combine like terms: 4n + 5n = 9n 1 + 7n = 1 + 9n Add '-1' to each side of the equation. 1 + -1 + 7n = 1 + -1 + 9n Combine like terms: 1 + -1 = 0 0 + 7n = 1 + -1 + 9n 7n = 1 + -1 + 9n Combine like terms: 1 + -1 = 0 7n = 0 + 9n 7n = 9n Solving 7n = 9n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-9n' to each side of the equation. 7n + -9n = 9n + -9n Combine like terms: 7n + -9n = -2n -2n = 9n + -9n Combine like terms: 9n + -9n = 0 -2n = 0 Divide each side by '-2'. n = 0 Simplifying n = 0
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