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