Given $\frac{1}{f}=\frac{1}{d_0}+\frac{1}{d_i}$; solve for each variable in terms of the remaining two:

Given $tan=\frac{x}{L},sin=m\frac{}{d},=532nm,m=3,L=0\mathrm{.}9m,x=3\mathrm{.}2cm$ find $d$ in $mm$ :