a + 9d = 82
a + 31d = 162
=> 22d = 80
=>d = 40/11
a = 902 - 360/11 = 542/11
=> a + 19d
=> 542 + 760 /11 = 1302/11
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a + 9d = 82
a + 31d = 162
=> 22d = 80
=>d = 40/11
a = 902 - 360/11 = 542/11
=> a + 19d
=> 542 + 760 /11 = 1302/11