I need to find my other equation

Question

Question is : Margie is responsible for buting a weeks supply of food and medication and a shelter. The food and medication for each dog costs twice as much as those supply's for a cat. She needs to feed 164 cats and 24 dogs. Her budget is 4240. How much can Margie spend in each dog for food and medication.

Answer 1

Let C = cost to feed cats and D= cost to feed dogs. 

 

From the problem it costs twice as much to feed dog as cat so D= 2C

 

she can spend 4240 And has 164 cats and 24 dogs so

164C + 24D must be less than 4240

 

besT - David