Question 151013
Remember: W= white eggs; B= brown eggs
1st condtn.
{{{3W+2B=13 grams}}}
2nd condtn.
{{{5W+4B=24grams}}}
In 1st condtn. we get {{{B=(13-3W)/2}}} and substitute in 2nd condition:
Continuing,
{{{5W+cross(4)2(13-3W)/cross(2)=24}}}
{{{5W+26-6W=24}}}
{{{26-24=6W-5W}}} ------------> {{{W=2grams}}}, 
and in condtn 1: ----------> {{{(3*2)+2B=13grams}}} ---> {{{B=3.5grams}}}
To check, we pick condtn 2 this time:
{{{(5*2) + (4*3.5) = 24grams}}}
{{{10+14=24grams}}}
{{{24grams=24grams}}}, cool!
Thank you,
Jojo