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Simplifying (x + -5) + -7 = x Reorder the terms: (-5 + x) + -7 = x Remove parenthesis around (-5 + x) -5 + x + -7 = x Reorder the terms: -5 + -7 + x = x Combine like terms: -5 + -7 = -12 -12 + x = x Add '-1x' to each side of the equation. -12 + x + -1x = x + -1x Combine like terms: x + -1x = 0 -12 + 0 = x + -1x -12 = x + -1x Combine like terms: x + -1x = 0 -12 = 0 Solving -12 = 0 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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