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Simplifying 50 + 4d = 21d Solving 50 + 4d = 21d Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-21d' to each side of the equation. 50 + 4d + -21d = 21d + -21d Combine like terms: 4d + -21d = -17d 50 + -17d = 21d + -21d Combine like terms: 21d + -21d = 0 50 + -17d = 0 Add '-50' to each side of the equation. 50 + -50 + -17d = 0 + -50 Combine like terms: 50 + -50 = 0 0 + -17d = 0 + -50 -17d = 0 + -50 Combine like terms: 0 + -50 = -50 -17d = -50 Divide each side by '-17'. d = 2.941176471 Simplifying d = 2.941176471
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