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Simplifying 9 + 2d = 2d Add '-2d' to each side of the equation. 9 + 2d + -2d = 2d + -2d Combine like terms: 2d + -2d = 0 9 + 0 = 2d + -2d 9 = 2d + -2d Combine like terms: 2d + -2d = 0 9 = 0 Solving 9 = 0 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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