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Simplifying f(d) = 120 + 60d Multiply f * d df = 120 + 60d Solving df = 120 + 60d Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-60d' to each side of the equation. -60d + df = 120 + 60d + -60d Combine like terms: 60d + -60d = 0 -60d + df = 120 + 0 -60d + df = 120 Reorder the terms: -120 + -60d + df = 120 + -120 Combine like terms: 120 + -120 = 0 -120 + -60d + df = 0 The solution to this equation could not be determined.
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