Question

A 720ml container holds a mixture of red, yellow & white paint in a 5:3:12 ratio. How much more red paint than yellow is present in the mixture?

Answer 1

5x+3x+12x=720
x=36
red paint=5(36)=180=r
yellow paint=3(36)=108=y
r-y=180=108=72ml

Answer 2

^last line should be
r-y=180-108=72ml