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Simplifying 2f + 4 = 2f + 4 Reorder the terms: 4 + 2f = 2f + 4 Reorder the terms: 4 + 2f = 4 + 2f Add '-4' to each side of the equation. 4 + -4 + 2f = 4 + -4 + 2f Combine like terms: 4 + -4 = 0 0 + 2f = 4 + -4 + 2f 2f = 4 + -4 + 2f Combine like terms: 4 + -4 = 0 2f = 0 + 2f 2f = 2f Add '-2f' to each side of the equation. 2f + -2f = 2f + -2f Combine like terms: 2f + -2f = 0 0 = 2f + -2f Combine like terms: 2f + -2f = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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