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Simplifying 2n + 7n + -10(n + -3) = 0 Reorder the terms: 2n + 7n + -10(-3 + n) = 0 2n + 7n + (-3 * -10 + n * -10) = 0 2n + 7n + (30 + -10n) = 0 Reorder the terms: 30 + 2n + 7n + -10n = 0 Combine like terms: 2n + 7n = 9n 30 + 9n + -10n = 0 Combine like terms: 9n + -10n = -1n 30 + -1n = 0 Solving 30 + -1n = 0 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-30' to each side of the equation. 30 + -30 + -1n = 0 + -30 Combine like terms: 30 + -30 = 0 0 + -1n = 0 + -30 -1n = 0 + -30 Combine like terms: 0 + -30 = -30 -1n = -30 Divide each side by '-1'. n = 30 Simplifying n = 30
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