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Simplifying (n + -3) * 7 = 28 Reorder the terms: (-3 + n) * 7 = 28 Reorder the terms for easier multiplication: 7(-3 + n) = 28 (-3 * 7 + n * 7) = 28 (-21 + 7n) = 28 Solving -21 + 7n = 28 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 7n = 28 + 21 Combine like terms: -21 + 21 = 0 0 + 7n = 28 + 21 7n = 28 + 21 Combine like terms: 28 + 21 = 49 7n = 49 Divide each side by '7'. n = 7 Simplifying n = 7
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