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