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Simplifying -1(4 + 5) = 0 Combine like terms: 4 + 5 = 9 -1(9) = 0 Multiply -1 * 9 -9 = 0 Solving -9 = 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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