Oh thats easy!!!
s-small popcorn $1
L- large popcorn $3
Total money-$507
Total bags-301
Equation:
3L+1S=$507
L+S=301 subtract by substituting
2L=206 divide
L (or y)=103
3(103)+1S=507 replace"L" for 103, then multiply
309+1S=507 subtract 309 from 507
1S=198-----> S(or x)=198
Coordinates are
(198,103)
Hope this helps...
Enjoy and Merry Early Christmas!!!!