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Jamal is planning the seating for the new auditorium. He drew 15 seats for the first row, and is planning on each following row to have 3 more seats. Write a function that can be used to solve for the
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Jamal is planning the seating for the new auditorium. He drew 15 seats for the first row, and is planning on each following row to have 3 more seats. Write a function that can be used to solve for the number of seats Jamal will have in the nth row.

User Mohammed Sadiq
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If he wants to have 3 seats more in each row it will go from 18 to 21 to 24 etc. In this case the equation will be y=3x+12
User Khaled Lela
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