It takes
gallons of paint to paint each square yard of wall
Solution:
Given that Tyler painted
square yards of wall area with 3 gallons of paint
To find: gallons of paint needed to paint each square yard of wall
From given question,
Let "x" be the gallons of paint needed to paint each square yard of wall

1 square yard = x gallons of paint
Mathematically this is proportion, by cross multiplying we get,

Thus it takes
gallons of paint to paint each square yard of wall.