Question 936523
Jemima wants only whole numbers of bags.
c, bags of chocolate chips
w, bags of walnuts



Try accounting for the mass and for the cost.


MASS:
{{{(3/4)c+(1/4)w=3}}}


COST:
Remember, c and w are counting the numbers of BAGS.  The prices are given to include per bag.
{{{3c+2w<=15}}}



Be sure that discussion makes sense before continuing.



Ready?.....


Simplification allows for easy use of Elimination Method part way through.
I found {{{highlight(w=c=3)}}}, three bags of each item.