Hi

Where am I going wrong in trying to rearrange this:

$\displaystyle

\frac{x+a}{x+b} = c

$

$\displaystyle

x+a = c(x+b)

$

$\displaystyle

\frac{x+a}{c} = x+b

$

$\displaystyle

\frac{x+a}{c}-b = x

$

$\displaystyle

x+a - cb = xc

$

$\displaystyle

a - cb = xc - x

$

$\displaystyle

\frac{a-cb}{c} = x - x

$

Thanks