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