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Simplifying 47 = 20 + 9f Solving 47 = 20 + 9f Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-9f' to each side of the equation. 47 + -9f = 20 + 9f + -9f Combine like terms: 9f + -9f = 0 47 + -9f = 20 + 0 47 + -9f = 20 Add '-47' to each side of the equation. 47 + -47 + -9f = 20 + -47 Combine like terms: 47 + -47 = 0 0 + -9f = 20 + -47 -9f = 20 + -47 Combine like terms: 20 + -47 = -27 -9f = -27 Divide each side by '-9'. f = 3 Simplifying f = 3
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