Question 914819
Find Ap IF T8=23 AND T17 is 9 more than T14


a+7d=23
T14 = a+13d

T17=a+16d
T17=a+13d+9

a+16d = a+13d+9

16d-13d=9
3d=9
d=3

a+7d=23
a+7*3=23
a+21=23
z=23-21
a=2


2,5,8,11,14,17,20,23 ..........