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Simplifying 2x + (199 + -2x) = 199 Remove parenthesis around (199 + -2x) 2x + 199 + -2x = 199 Reorder the terms: 199 + 2x + -2x = 199 Combine like terms: 2x + -2x = 0 199 + 0 = 199 199 = 199 Add '-199' to each side of the equation. 199 + -199 = 199 + -199 Combine like terms: 199 + -199 = 0 0 = 199 + -199 Combine like terms: 199 + -199 = 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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