# Math Help - Make x the subject of the formula (:-[)

1. ## Make x the subject of the formula (:-[)

b.x/c = d/(1000*(10^(f+log(5/x))))

2. Originally Posted by Riley_5000
b.x/c = d/(1000*(10^(f+log(5/x))))
$\frac{bx}{c}=\frac{d}{1000(10^{f\log(5/x)}}$

$bx1000(10^{f\log(5/x)} = dc$

$10^{f\log(5/x)} = \frac{dc}{1000bx}$

Take the log of both sides

$f\log(5/x)\log(10) = \log(\frac{dc}{1000bx})$

Can you finish this?