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Simplifying 7(k + -1) = 2k + 9 + 5k Reorder the terms: 7(-1 + k) = 2k + 9 + 5k (-1 * 7 + k * 7) = 2k + 9 + 5k (-7 + 7k) = 2k + 9 + 5k Reorder the terms: -7 + 7k = 9 + 2k + 5k Combine like terms: 2k + 5k = 7k -7 + 7k = 9 + 7k Add '-7k' to each side of the equation. -7 + 7k + -7k = 9 + 7k + -7k Combine like terms: 7k + -7k = 0 -7 + 0 = 9 + 7k + -7k -7 = 9 + 7k + -7k Combine like terms: 7k + -7k = 0 -7 = 9 + 0 -7 = 9 Solving -7 = 9 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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