Benjamin had 2 and 1/3 gallons of fruit punch left after a party. he had 1 and 3/4 gallon of lemonade left. how many total gallons did he have left? answer soon as possible. need it by the end today! you!

Turn the mixed numbers into improper fractions first.
2  1/3  =  7/3
1   3/4  =   7/4


Now add the fractions 
7/3 + 7/4
Find the common denominator by multiplying
7 x 4           7 x 3        49
     +      = 
3 x 4          4 x 3         12

Now convert to a mixed number
49/12 = 4 and 1/12 is your answer

No solution : there is no number of boxes that she bought