Question 926187
{{{N=7Q}}}
.
.
.
{{{0.05N+0.25Q=3.60}}}
{{{N+5Q=72}}}
.
.
Substitute from above,
{{{7Q+5Q=72}}}
{{{12Q=72}}}
{{{Q=6}}}
Then,
{{{N=7(6)}}}
{{{N=42}}}