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Simplifying 2x + -14 + x = 3x + -21 + 7 Reorder the terms: -14 + 2x + x = 3x + -21 + 7 Combine like terms: 2x + x = 3x -14 + 3x = 3x + -21 + 7 Reorder the terms: -14 + 3x = -21 + 7 + 3x Combine like terms: -21 + 7 = -14 -14 + 3x = -14 + 3x Add '14' to each side of the equation. -14 + 14 + 3x = -14 + 14 + 3x Combine like terms: -14 + 14 = 0 0 + 3x = -14 + 14 + 3x 3x = -14 + 14 + 3x Combine like terms: -14 + 14 = 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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