Question 998696
m, price for Marigold seeds
c, price for Carnation seeds


{{{system(20m+16c=278.72,23m+20c=329.44)}}}


{{{system(5m+4c=69.68,23m+20c=329.44)}}}
Any method you want from here for this system.  Suggestion is multiply all first equation by 5 and eliminate terms of c.