Question 1201899
<pre>
                    PRICE         COUNT         COST

TENT                 t             1             t

SLEEP BAG            c+21          5           5(c+21)

CAMP TOOL            c             2           2c

COST of PURCHASE                               231
</pre>
The best you can do is find an equation in two unknown variables.

{{{t+5c+105+2c=231}}}

{{{t+7c=231-105}}}

{{{highlight_green(t+7c=126)}}}--------not much more to do unless more information given