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Simplifying -5n + 39n + -7 = 129 Reorder the terms: -7 + -5n + 39n = 129 Combine like terms: -5n + 39n = 34n -7 + 34n = 129 Solving -7 + 34n = 129 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 34n = 129 + 7 Combine like terms: -7 + 7 = 0 0 + 34n = 129 + 7 34n = 129 + 7 Combine like terms: 129 + 7 = 136 34n = 136 Divide each side by '34'. n = 4 Simplifying n = 4
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