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Simplifying -8 = 0.4(3.2 + n) -8 = (3.2 * 0.4 + n * 0.4) -8 = (1.28 + 0.4n) Solving -8 = 1.28 + 0.4n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.4n' to each side of the equation. -8 + -0.4n = 1.28 + 0.4n + -0.4n Combine like terms: 0.4n + -0.4n = 0.0 -8 + -0.4n = 1.28 + 0.0 -8 + -0.4n = 1.28 Add '8' to each side of the equation. -8 + 8 + -0.4n = 1.28 + 8 Combine like terms: -8 + 8 = 0 0 + -0.4n = 1.28 + 8 -0.4n = 1.28 + 8 Combine like terms: 1.28 + 8 = 9.28 -0.4n = 9.28 Divide each side by '-0.4'. n = -23.2 Simplifying n = -23.2
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