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Simplifying (x + 20) = (x + 20) Reorder the terms: (20 + x) = (x + 20) Remove parenthesis around (20 + x) 20 + x = (x + 20) Reorder the terms: 20 + x = (20 + x) Remove parenthesis around (20 + x) 20 + x = 20 + x Add '-20' to each side of the equation. 20 + -20 + x = 20 + -20 + x Combine like terms: 20 + -20 = 0 0 + x = 20 + -20 + x x = 20 + -20 + x Combine like terms: 20 + -20 = 0 x = 0 + x x = x Add '-1x' to each side of the equation. x + -1x = x + -1x Combine like terms: x + -1x = 0 0 = x + -1x Combine like terms: x + -1x = 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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