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Simplifying 2x + (121 + -2x) = 121 Remove parenthesis around (121 + -2x) 2x + 121 + -2x = 121 Reorder the terms: 121 + 2x + -2x = 121 Combine like terms: 2x + -2x = 0 121 + 0 = 121 121 = 121 Add '-121' to each side of the equation. 121 + -121 = 121 + -121 Combine like terms: 121 + -121 = 0 0 = 121 + -121 Combine like terms: 121 + -121 = 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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