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Simplifying (x + 7) = (x + -9) Reorder the terms: (7 + x) = (x + -9) Remove parenthesis around (7 + x) 7 + x = (x + -9) Reorder the terms: 7 + x = (-9 + x) Remove parenthesis around (-9 + x) 7 + x = -9 + x Add '-1x' to each side of the equation. 7 + x + -1x = -9 + x + -1x Combine like terms: x + -1x = 0 7 + 0 = -9 + x + -1x 7 = -9 + x + -1x Combine like terms: x + -1x = 0 7 = -9 + 0 7 = -9 Solving 7 = -9 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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