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Simplifying x + -1(7 + x) = 49 x + (7 * -1 + x * -1) = 49 x + (-7 + -1x) = 49 Reorder the terms: -7 + x + -1x = 49 Combine like terms: x + -1x = 0 -7 + 0 = 49 -7 = 49 Solving -7 = 49 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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