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Simplifying 21 = 0.7n Solving 21 = 0.7n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.7n' to each side of the equation. 21 + -0.7n = 0.7n + -0.7n Combine like terms: 0.7n + -0.7n = 0.0 21 + -0.7n = 0.0 Add '-21' to each side of the equation. 21 + -21 + -0.7n = 0.0 + -21 Combine like terms: 21 + -21 = 0 0 + -0.7n = 0.0 + -21 -0.7n = 0.0 + -21 Combine like terms: 0.0 + -21 = -21 -0.7n = -21 Divide each side by '-0.7'. n = 30 Simplifying n = 30
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