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Simplifying 2x + (-2x) + 4 = 4 Reorder the terms: 4 + 2x + (-2x) = 4 Combine like terms: 2x + (-2x) = 0 4 + 0 = 4 4 = 4 Add '-4' to each side of the equation. 4 + -4 = 4 + -4 Combine like terms: 4 + -4 = 0 0 = 4 + -4 Combine like terms: 4 + -4 = 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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