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Simplifying -39 = 8f + -139 Reorder the terms: -39 = -139 + 8f Solving -39 = -139 + 8f Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-8f' to each side of the equation. -39 + -8f = -139 + 8f + -8f Combine like terms: 8f + -8f = 0 -39 + -8f = -139 + 0 -39 + -8f = -139 Add '39' to each side of the equation. -39 + 39 + -8f = -139 + 39 Combine like terms: -39 + 39 = 0 0 + -8f = -139 + 39 -8f = -139 + 39 Combine like terms: -139 + 39 = -100 -8f = -100 Divide each side by '-8'. f = 12.5 Simplifying f = 12.5
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