Question 1196225
a gymnasium has 52 rows of seats. the last row contains 92 seats. if each row has 3 fewer seats tan the row behind it, how many seats are there in the first row?
<pre>If what you meant was that "each row has 3 fewer seats than the row <s>behind </s> in front of it," 
the AP would be: {{{matrix(2,3, a[n], "=", a[1] + (n- 1)d, a[52], "=", a[1] + (52 - 1)-3)}}}, and the first row would have 245 seats.