If the first term of an arithmetic sequence equals the third minus the second, and the fourth term is $8$, what is the first term?
Question:
If the first term of an arithmetic sequence equals the third minus the second, and the fourth term is $8$, what is the first term?
Answer:
Let's think step by step.

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If the first term of an arithmetic sequence equals the third minus the second, and the fourth term is $8$, what is the first term?
train