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Simplifying 0.7(6 + -3n) = -2.1 (6 * 0.7 + -3n * 0.7) = -2.1 (4.2 + -2.1n) = -2.1 Solving 4.2 + -2.1n = -2.1 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-4.2' to each side of the equation. 4.2 + -4.2 + -2.1n = -2.1 + -4.2 Combine like terms: 4.2 + -4.2 = 0.0 0.0 + -2.1n = -2.1 + -4.2 -2.1n = -2.1 + -4.2 Combine like terms: -2.1 + -4.2 = -6.3 -2.1n = -6.3 Divide each side by '-2.1'. n = 3 Simplifying n = 3
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