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Simplifying 13 = (x + -2) + -1(x + -7) Reorder the terms: 13 = (-2 + x) + -1(x + -7) Remove parenthesis around (-2 + x) 13 = -2 + x + -1(x + -7) Reorder the terms: 13 = -2 + x + -1(-7 + x) 13 = -2 + x + (-7 * -1 + x * -1) 13 = -2 + x + (7 + -1x) Reorder the terms: 13 = -2 + 7 + x + -1x Combine like terms: -2 + 7 = 5 13 = 5 + x + -1x Combine like terms: x + -1x = 0 13 = 5 + 0 13 = 5 Solving 13 = 5 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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