# Math Help - Rearranging Equations

1. ## Rearranging Equations

Hi,

How would l go about re-arranging the following equation to find L?

X = FL^3/3EI

2. ## ?

Not sure if this is really what you are asking, but I am taking each of $X,F,E,L,I\in \mathbb{R}$ just variables in some equation. Note $E,I\not = 0$ or else you get division by 0.

$X = \frac{FL^3}{3EI}$

$3XEI= FL^3$

$\frac{3XEI}{F}= L^3$

$(\frac{3XEI}{F})^{1/3}= L$

If $F=0$ you get $X=0$ and $L$ could be anything.