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Simplifying -8f + 5 + -4 = -21 Reorder the terms: 5 + -4 + -8f = -21 Combine like terms: 5 + -4 = 1 1 + -8f = -21 Solving 1 + -8f = -21 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -8f = -21 + -1 Combine like terms: 1 + -1 = 0 0 + -8f = -21 + -1 -8f = -21 + -1 Combine like terms: -21 + -1 = -22 -8f = -22 Divide each side by '-8'. f = 2.75 Simplifying f = 2.75
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