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Simplifying (n + n) + -7 = 90 Combine like terms: n + n = 2n (2n) + -7 = 90 (2n) + -7 = 90 Reorder the terms: -7 + (2n) = 90 Solving -7 + (2n) = 90 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 + (2n) = 90 + 7 Combine like terms: -7 + 7 = 0 0 + (2n) = 90 + 7 (2n) = 90 + 7 Combine like terms: 90 + 7 = 97 (2n) = 97 Divide each side by '2'. n = 48.5 Simplifying n = 48.5
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