[tex]Just \ rearrange \ and \ solve: \\ \\ \frac{1}{4x} = 5 \ \ (*4x) \\ \\ 20x = 1 \ \ (/20)
\\ \\ x = 1/20[/tex]
With equations, you can add, subtract, multiply and/or divide by any amount so long as whatever you do is done to both sides of the equation;
Using this principle we can rearrange equations to give us the value of an unkown variable.
