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Simplifying 15f + -8f + 12 = 55 Reorder the terms: 12 + 15f + -8f = 55 Combine like terms: 15f + -8f = 7f 12 + 7f = 55 Solving 12 + 7f = 55 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + 7f = 55 + -12 Combine like terms: 12 + -12 = 0 0 + 7f = 55 + -12 7f = 55 + -12 Combine like terms: 55 + -12 = 43 7f = 43 Divide each side by '7'. f = 6.142857143 Simplifying f = 6.142857143
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