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Simplifying 2 + 7(d + 11) = 9 + 7d Reorder the terms: 2 + 7(11 + d) = 9 + 7d 2 + (11 * 7 + d * 7) = 9 + 7d 2 + (77 + 7d) = 9 + 7d Combine like terms: 2 + 77 = 79 79 + 7d = 9 + 7d Add '-7d' to each side of the equation. 79 + 7d + -7d = 9 + 7d + -7d Combine like terms: 7d + -7d = 0 79 + 0 = 9 + 7d + -7d 79 = 9 + 7d + -7d Combine like terms: 7d + -7d = 0 79 = 9 + 0 79 = 9 Solving 79 = 9 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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