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Simplifying c + 7 + -1(c + 7) = 47 Reorder the terms: c + 7 + -1(7 + c) = 47 c + 7 + (7 * -1 + c * -1) = 47 c + 7 + (-7 + -1c) = 47 Reorder the terms: 7 + -7 + c + -1c = 47 Combine like terms: 7 + -7 = 0 0 + c + -1c = 47 c + -1c = 47 Combine like terms: c + -1c = 0 0 = 47 Solving 0 = 47 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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