Answer:
The steps are :
[tex] \frac{c - dx}{rx + t} = w[/tex]
[tex]c - dx = w(rx + t)[/tex]
[tex]c - dx = wrx + wt[/tex]
[tex]c - wt = wrx + dx[/tex]
[tex]c - wt = x(wr + d)[/tex]
[tex] \frac{c - wt}{wr + d} = x[/tex]
[tex]x = \frac{c - wt}{wr + d} [/tex]
