Question 54059
Hi Sher,
If you mean: 
{{{D=c-s/n}}}
{{{D-c=-c+c-s/n}}}
{{{D-c=-s/n}}}
{{{-n(D-c)=-n(-s/n)}}}
{{{-Dn+Cn=s}}}
If you mean:
{{{D=(c-s)/n}}}
{{{Dn=n(c-s)/n}}}
{{{Dn=c-s}}}
{{{Dn-c=-s}}}
{{{-(Dn-c)=-(-s)}}}
{{{-Dn+c=s}}}
Happy Calculating!!!