Algebra-1

Question Analysis
This question evaluates the student's ability to find the first term of an arithmetic sequence when given a specific term and the common difference. The problem provides the 4th and 8th terms and the common difference, and asks for the first term.

Key Concept Explanation
The first term can be found using the formula , where is a known term, is its position, and is the common difference.

Step-by-step Solution
1. Identify the given values: , , and

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