c(r+1)=n...PLEASE reply!

[dolphinfreak]

does anyone know how to solve for r in this equasion? c(r+1)=n? c is your current pay, r is your raise percentage and n is your new wage. i alson need a reason for each step. pplz help me!!! thanx!

 

[ting]

c(r+1)=n

You want to make r the subject.

Step 1.

Distribute, becuase the r is trapped with +1.


cr + c = n


Step 2.


Subtract c, because you want to take the c away and waht you do to one side you have to do to the other.


cr = n-c


Step 3.

Divide both sides by c, because dividing by c on the LHS cancels multiplying by c and what we do to one side we must do to all the terms the other side.

r = (n-c)/c