Question 317164
1.{{{Q+D=18}}}
Let T be the total value of the register,
{{{T=25Q+10D}}}
From 1,
{{{D=18-Q}}}
.
.
.
{{{T=25Q+10(18-Q)}}}
{{{T=25Q+180-10Q}}}
{{{highlight(T=15Q+180)}}}