solve for r. k=2r-s

Question

I do not no how to solve for r.

 

 

Answer 1

Hi Skyler,

 

So if this is the only information that is given, we're going to solve for "r" in terms of variables. In other words, we're just going to use the letters as if they were numbers.

 

k=2r-s

 

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 your final answer!

 

Hope that helps!

Nikita