Answer: $45
Step-by-step explanation: Let the amount of money be x ,
Then , after Jamila spent $33 , the remaining money is x-33,
Also , after Akiko spent $42 , the remaining money is x- 42,
since Jamila is now having 4 times as much money left as Akiko, we have
x - 33 = 4 ( x - 42)
x - 33 = 4x - 168
-33+168 = 4x - x
135 = 3x
Therefore ,
x = 45