<PRE><B>Question 171970</B>
I am choosing P to represent the # of photos taken on day 2 which makes day 3 equal to 2P.  Day 1 is a constant.
Day1: 10
Day2: P
Day3: 2P
:
all photos......{{{10+P+3P=T}}} where T is the total of all photos taken
:
simplified: 10+3P=T
:
if day 2 is 12 then {{{highlight(T=10+3(12)=46)}}} pho</PRE>