# Math Help - Rearrange formula?

1. ## Rearrange formula?

Hi i am struggling with a problem, i have to rearrange a formula making B the subject.

x=b-c/a

If anyone could help me through this i would be very appreciative.

2. Originally Posted by nexer
Hi i am struggling with a problem, i have to rearrange a formula making B the subject.

x=b-c/a

If anyone could help me through this i would be very appreciative.
Does subject mean output?

3. believe so, i need to rearrange the formula so i can work other stuff out from the rearranged formula.

4. Just add $c/a$ on both sides (unless you miswrote your equation, because it seems too easy).

5. umm. . . its (b-c)/a if that makes a difference?

6. Originally Posted by nexer
umm. . . its (b-c)/a if that makes a difference?
In that case, mult. both sides by a, then add c to both sides.

7. So i'm getting b=xa+c? looks too simple to be true. but thanks for all help.

8. Originally Posted by nexer
So i'm getting b=xa+c? looks too simple to be true. but thanks for all help.
Well, as I said before, I'm not entirely certain what "subject" means as it relates to math. That's a new one for me.

I think we're right though.

9. Originally Posted by VonNemo19
Well, as I said before, I'm not entirely certain what "subject" means as it relates to math. That's a new one for me.

I think we're right though.
I think what he means by subject is the variable one is willing to evaluate (so it is on its own on a side of the equation). It's the same term in physics too. So, I think we're right too.