Answer: d ≤ -1/3
Explanation:
1. Add 5 to both sides
6d -5 +5 ≤ 3d - 6 + 5
6d ≤ 3d - 1
2. Isolate the variable
6d -3d ≤ 3d -3d -1
3d ≤ -1
3. Divide
d ≤ -1/3
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