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Simplifying 21f + -13 = 16f + 2 Reorder the terms: -13 + 21f = 16f + 2 Reorder the terms: -13 + 21f = 2 + 16f Solving -13 + 21f = 2 + 16f Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-16f' to each side of the equation. -13 + 21f + -16f = 2 + 16f + -16f Combine like terms: 21f + -16f = 5f -13 + 5f = 2 + 16f + -16f Combine like terms: 16f + -16f = 0 -13 + 5f = 2 + 0 -13 + 5f = 2 Add '13' to each side of the equation. -13 + 13 + 5f = 2 + 13 Combine like terms: -13 + 13 = 0 0 + 5f = 2 + 13 5f = 2 + 13 Combine like terms: 2 + 13 = 15 5f = 15 Divide each side by '5'. f = 3 Simplifying f = 3
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