How do I do this one?

Question

ric and Stephanie took their younger sister Melissa to pick apples. Eric picked 4 times as many apples as Melissa. Stephanie picked 6 times as many apples as Melissa. Eric and Stephanie picked 180 apples together.

 

Find the number of apples Melissa picked.

Answer 1

e=4m

s=6m

e+s=180

s=.6x180=108= 6m

m=108/6= 18 apples for melissa

e=72=4m

m=72/4=18