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Simplifying -7 + [-1(-9)] = 0 Multiply -1 * -9 -7 + [9] = 0 -7 + 9 = 0 Combine like terms: -7 + 9 = 2 2 = 0 Solving 2 = 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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