An arithmetic sequence has this recursive formula:
a1=7

s = 1

Step-by-step explanation:

I moved all terms to the left:

2(8s-1)-(14s)=0

I added all the numbers together, and all the variables

-14s+2(8s-1)=0

I multiplied parentheses

-14s+16s-2=0

I added all the numbers together, and all the variables

2s-2=0

I moved all terms containing s to the left, all other terms to the right

2s=2

s=2/2

s=1