Subtract Sean's blue paint (4.5) from the total (7.8). He used 3.3 pints of white. ️
To find out how much white paint Sean used, we can subtract the amount of blue paint from the total amount of paint he used:
Total paint used: 7.8 pints
Blue paint used: 4.5 pints
Therefore, the amount of white paint used is:
White paint used = Total paint used - Blue paint used
White paint used = 7.8 pints - 4.5 pints
White paint used = 3.3 pints
So, Sean used 3.3 pints of white paint to paint his bedroom walls.