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Simplifying 5(7 * 3 + 7) + 15 = 0 Multiply 7 * 3 5(21 + 7) + 15 = 0 Combine like terms: 21 + 7 = 28 5(28) + 15 = 0 Multiply 5 * 28 140 + 15 = 0 Combine like terms: 140 + 15 = 155 155 = 0 Solving 155 = 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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