A point $(3\sqrt{5},d+3)$ is $3d$ units away from the origin. What is the smallest possible value of $d$?
Question:
A point $(3\sqrt{5},d+3)$ is $3d$ units away from the origin. What is the smallest possible value of $d$?
Answer:
Let's think step by step.

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A point $(3\sqrt{5},d+3)$ is $3d$ units away from the origin. What is the smallest possible value of $d$?
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