The difference between two numbers is 3.2. The sum of the numbers is 46.4. What could the two numbers be?

X+y=46.4

x-y=3.2

solving for y

3.2+y=x

substitute

3.2+y+y=46.4

simplify

3.2+2y=46.4

solve for y

y = (46.4-3.2) / 2

y=21.6

put y into equation

x+y=46.4

x+21.6=46.4

x=46.4-21.6

x=24.8

your two numbers are 24.8 and 21.6