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Simplifying (x + -3) + -1(x + 6) = 20 Reorder the terms: (-3 + x) + -1(x + 6) = 20 Remove parenthesis around (-3 + x) -3 + x + -1(x + 6) = 20 Reorder the terms: -3 + x + -1(6 + x) = 20 -3 + x + (6 * -1 + x * -1) = 20 -3 + x + (-6 + -1x) = 20 Reorder the terms: -3 + -6 + x + -1x = 20 Combine like terms: -3 + -6 = -9 -9 + x + -1x = 20 Combine like terms: x + -1x = 0 -9 + 0 = 20 -9 = 20 Solving -9 = 20 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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