How do you do 2/5w-w=-3/5w-2/5

Afactory adds 3 red drops and 2 blue drops of coloring to white paint to make each pint of purple paint. the factory will make 50 gallons of the purple paint. how many drops of red and blue coloring will the factory need in the 50 gallon batch of purple paint.

Which statements about these triangles is true

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs