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Simplifying 7d + 3 = 45 Reorder the terms: 3 + 7d = 45 Solving 3 + 7d = 45 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 7d = 45 + -3 Combine like terms: 3 + -3 = 0 0 + 7d = 45 + -3 7d = 45 + -3 Combine like terms: 45 + -3 = 42 7d = 42 Divide each side by '7'. d = 6 Simplifying d = 6
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