Anna painted 1/6 of a wall, Eric painted 1/5 of the wall, and Meadow painted 1/4 of the wall. There are now 3910 square feet left to paint. How many square feet did Anna paint?
Using 60 as a common denominator through least common multiple, we get:
1/6 = 10/60
1/5 = 12/60
1/4 = 15/60
10/60 +...