Luna
This is math, not painting. Whole different side of the brain!

Puppy Zwolle
Nice you pick the painting section for this question... we SHOULD know this right? x is the number of days. You need to 'convert' that to % per day. So Melanie paints x/1 barns per day and Melissa 1/2x = 0.5/x added 1/x + .5/x = 1.5/x per day for the two of them or Melanie 5 days to complete so -> 1/5 =20% in a day Melissa 10 day to complete s0-> = 1/10 =10% in a day 30% total per day or 1.5/5 = 0.3 = 30%

Marsika
Luna I LOVE you answer ... LOL. I ain't good a math either. Languages and literature, that I can do!