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Simplifying 2d + -1 = -7 Reorder the terms: -1 + 2d = -7 Solving -1 + 2d = -7 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + 2d = -7 + 1 Combine like terms: -1 + 1 = 0 0 + 2d = -7 + 1 2d = -7 + 1 Combine like terms: -7 + 1 = -6 2d = -6 Divide each side by '2'. d = -3 Simplifying d = -3
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