Very likely...... I assume
Answer:

Step-by-step explanation:
To solve for s, you need to follow these steps.
First multiply by t both sides of the equation.


We get 
Now we divide by r, both sides of the equation.

Finallly we obtain:
or

Answer:
x= 5 ........................ .......
The answer is 1/4 because all you have to really do is simplify