Answer:
Explanation:
1) Multiply both sides by d.
2) Simplify 20/13d to 20d/13.
3) Multiply both sides by 13.
4) Simplify 60 × 13 to 780.
5) Divide both sides by 20.
6) Simplify 780/20 to 39.
Therefor, the answer is d = 39.
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