A boys spends 34 of his pocket money and then 4 by 5 of the reminder is given to his sister if he has rupees 40 left, what did you have at first?
Let the pocket money be =x
x−3x4 is amount remaining with him after spending money.
Now, he gave 45 of remaining amount to his sister.
then the remaining amount is x4−45×x4
According to given question remaining amount is 40
His pocket money is 800