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Simplifying -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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