Ahmad is a poor man. He has no money.
He wants to buy a shirt that cost $50.00
He borrows from his friend, A, $25.00
He borrows from his friend, B, $25.00
He goes to the shop to buy the shirt.
The shirt is on sale. Now, it costs only $45.00
He pays for the shirt and gets a $5.00 in change.
He pays back his friend, A, $1.00
He pays back his friend, B, $1.00
Now he has $3.00 in his pocket.
He owes his friend, A, $24.00
He owes his friend, B, $24.00
So, he owes $48.00 in total.
He still has $3.00
$48.00 + $3.00 = $51.00
How can there be $51.00 when he only borrowed $50.00?
Try to explain this!