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Simplifying 2(x + 3) + -1(2x + -7) = 12 Reorder the terms: 2(3 + x) + -1(2x + -7) = 12 (3 * 2 + x * 2) + -1(2x + -7) = 12 (6 + 2x) + -1(2x + -7) = 12 Reorder the terms: 6 + 2x + -1(-7 + 2x) = 12 6 + 2x + (-7 * -1 + 2x * -1) = 12 6 + 2x + (7 + -2x) = 12 Reorder the terms: 6 + 7 + 2x + -2x = 12 Combine like terms: 6 + 7 = 13 13 + 2x + -2x = 12 Combine like terms: 2x + -2x = 0 13 + 0 = 12 13 = 12 Solving 13 = 12 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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