Mr. Neeson mixes red and yellow paint to make orange paint. When 4 pails of yellow paint and 5 pails of red are mixed , it can produce a container of orange paint.

question: If Mr. Neeson uses a total of 63 pails of red and yellow paint , how many pails of yellow paint did he use?

(no other further information in the question) i'm stuck

2 answers

I would start out by writing this as an algebraic expression.
63/(5+4) = ?

? * 4 = ?