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Simplifying -4.2 = -2.1n Solving -4.2 = -2.1n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '2.1n' to each side of the equation. -4.2 + 2.1n = -2.1n + 2.1n Combine like terms: -2.1n + 2.1n = 0.0 -4.2 + 2.1n = 0.0 Add '4.2' to each side of the equation. -4.2 + 4.2 + 2.1n = 0.0 + 4.2 Combine like terms: -4.2 + 4.2 = 0.0 0.0 + 2.1n = 0.0 + 4.2 2.1n = 0.0 + 4.2 Combine like terms: 0.0 + 4.2 = 4.2 2.1n = 4.2 Divide each side by '2.1'. n = 2 Simplifying n = 2

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