Question

Do you know what K=2r-s is

Answer 1

Our goal is to get r all by itself on one side of the equals sign. To do this, we'll first add s to both sides

k=2r-s

+s   +s

k+s=2r

 

Now, to get r alone, we need to get rid of the 2. Since 2 is multiplied by r, we need to divide it from both sides to get r alone.

 

k+s=2r

/2    /2

 

(k+s)/2=r

 

Since there are no numbers, that's the final answer.