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Simplifying -9 + (-21)(0) + 1 = 0 Multiply -21 * 0 -9 + 0 + 1 = 0 Anything times zero is zero. -9 + 0 + 1 = 0 Combine like terms: -9 + 0 = -9 -9 + 1 = 0 Combine like terms: -9 + 1 = -8 -8 = 0 Solving -8 = 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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