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Simplifying 7 + -1(9 * 7) * 0 = 0 Multiply 9 * 7 7 + -1(63) * 0 = 0 Multiply -1 * 63 7 + -63 * 0 = 0 Multiply -63 * 0 7 + 0 = 0 Anything times zero is zero. 7 + 0 = 0 Combine like terms: 7 + 0 = 7 7 = 0 Solving 7 = 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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