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Simplifying 3d + -15 = 3(5 + d) Reorder the terms: -15 + 3d = 3(5 + d) -15 + 3d = (5 * 3 + d * 3) -15 + 3d = (15 + 3d) Add '-3d' to each side of the equation. -15 + 3d + -3d = 15 + 3d + -3d Combine like terms: 3d + -3d = 0 -15 + 0 = 15 + 3d + -3d -15 = 15 + 3d + -3d Combine like terms: 3d + -3d = 0 -15 = 15 + 0 -15 = 15 Solving -15 = 15 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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