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Simplifying 2x + x + 1 = x + 2x + 1 Reorder the terms: 1 + 2x + x = x + 2x + 1 Combine like terms: 2x + x = 3x 1 + 3x = x + 2x + 1 Reorder the terms: 1 + 3x = 1 + x + 2x Combine like terms: x + 2x = 3x 1 + 3x = 1 + 3x Add '-1' to each side of the equation. 1 + -1 + 3x = 1 + -1 + 3x Combine like terms: 1 + -1 = 0 0 + 3x = 1 + -1 + 3x 3x = 1 + -1 + 3x Combine like terms: 1 + -1 = 0 3x = 0 + 3x 3x = 3x Add '-3x' to each side of the equation. 3x + -3x = 3x + -3x Combine like terms: 3x + -3x = 0 0 = 3x + -3x Combine like terms: 3x + -3x = 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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