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Simplifying 2(2d + -1) = 4d + -7 Reorder the terms: 2(-1 + 2d) = 4d + -7 (-1 * 2 + 2d * 2) = 4d + -7 (-2 + 4d) = 4d + -7 Reorder the terms: -2 + 4d = -7 + 4d Add '-4d' to each side of the equation. -2 + 4d + -4d = -7 + 4d + -4d Combine like terms: 4d + -4d = 0 -2 + 0 = -7 + 4d + -4d -2 = -7 + 4d + -4d Combine like terms: 4d + -4d = 0 -2 = -7 + 0 -2 = -7 Solving -2 = -7 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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