if I want to buy a TV that is $50 dollars , and I borrowed $25 dollar from my mother and $25 dollars from my dad to buy the TV. I then owe $50 dollars, when I get to the store the TV is on special for $45 dollars. Coming out of the store I lend $3 dollars to my friends and left with $2 dollars, I then give my mother 1 dollar and my dad 1 dollar , so know I owe the $24 each, and 24 +24 =48, plus the 3 I lend my friend is 51. but I only borrowed 50. how do I have 51?