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Simplifying x + -1(x + 7) = x + (2 + -1x) Reorder the terms: x + -1(7 + x) = x + (2 + -1x) x + (7 * -1 + x * -1) = x + (2 + -1x) x + (-7 + -1x) = x + (2 + -1x) Reorder the terms: -7 + x + -1x = x + (2 + -1x) Combine like terms: x + -1x = 0 -7 + 0 = x + (2 + -1x) -7 = x + (2 + -1x) Remove parenthesis around (2 + -1x) -7 = x + 2 + -1x Reorder the terms: -7 = 2 + x + -1x Combine like terms: x + -1x = 0 -7 = 2 + 0 -7 = 2 Solving -7 = 2 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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