If the average (arithmetic mean) of x + 1, x + 5…

If the average (arithmetic mean) of x + 1, x + 5, and x + 9 is 0, then x =

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #36377

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