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