i know this is simple... but i'm dum.b sometimes and would love someone's help, please and thank you!

Answer:
s = 10
Step-by-step explanation:
First, subtract 1 from 7 to get 3s/5 = 6.
Next, multiply the denominator, 5, on both sides in order to get rid of it. Now you have 3s = 30.
Lastly, divide 3 on both sides to get s = 10.
Hope this helped :)