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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 '-1x' to each side of the equation. -20 + x + -1x = 20 + x + -1x Combine like terms: x + -1x = 0 -20 + 0 = 20 + x + -1x -20 = 20 + x + -1x Combine like terms: x + -1x = 0 -20 = 20 + 0 -20 = 20 Solving -20 = 20 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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