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Simplifying 15 = 3(6 + -6) Combine like terms: 6 + -6 = 0 15 = 3(0) Multiply 3 * 0 15 = 0 Anything times zero is zero. 15 = 0 Solving 15 = 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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