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Simplifying 3d + 7 = 3(d + -3) Reorder the terms: 7 + 3d = 3(d + -3) Reorder the terms: 7 + 3d = 3(-3 + d) 7 + 3d = (-3 * 3 + d * 3) 7 + 3d = (-9 + 3d) Add '-3d' to each side of the equation. 7 + 3d + -3d = -9 + 3d + -3d Combine like terms: 3d + -3d = 0 7 + 0 = -9 + 3d + -3d 7 = -9 + 3d + -3d Combine like terms: 3d + -3d = 0 7 = -9 + 0 7 = -9 Solving 7 = -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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