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Simplifying 13(d + 7) = 2(d + -3) + 11d Reorder the terms: 13(7 + d) = 2(d + -3) + 11d (7 * 13 + d * 13) = 2(d + -3) + 11d (91 + 13d) = 2(d + -3) + 11d Reorder the terms: 91 + 13d = 2(-3 + d) + 11d 91 + 13d = (-3 * 2 + d * 2) + 11d 91 + 13d = (-6 + 2d) + 11d Combine like terms: 2d + 11d = 13d 91 + 13d = -6 + 13d Add '-13d' to each side of the equation. 91 + 13d + -13d = -6 + 13d + -13d Combine like terms: 13d + -13d = 0 91 + 0 = -6 + 13d + -13d 91 = -6 + 13d + -13d Combine like terms: 13d + -13d = 0 91 = -6 + 0 91 = -6 Solving 91 = -6 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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