You saw a shirt for $97. You didn’t have the cash, so you borrowed $50 from your mum and $50 from your dad = $100. You bought the shirt, and had $3 change. You gave your dad $1 and your mum $1 and kept the other $1 for yourself. Now you owe your mum $49 and your dad $49. 49+49 = 98 + your $1 = 99. Where is the missing $1?
you don’t add the one dollar at the end because you’re talking in terms of debt. Subtract the one dollar you have (which is money you owe), then you have 97, the price of the shirt.
“A kiss is a lovely trick designed by nature to stop speech when words become superfluous.” —Ingrid Bergman