Spending 5

A boy spends 3/4 of his pocket money, and then 4/5 of the remainder is given to his sister. If he has 40 left, what did he have at first?

Correct answer:

x =  800

Step-by-step explanation:

43 x+54 (x43 x)+40=x  3/4 x+4/5 (x3/4 x)+40=x  x=800  x=1800=800  x=800

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