$97/2=$48.50, not $48. Therefore, $48.50+$1=$49.50x2=$99+$1=$100.
Nah, that can't be right. If you give your parents $1.50 each, you don't have a dollar for yourself, so you're still missing one.
You didn't give your parents $1.50. You give them each one.
They give you $100. $97/2=$48.50, so there's $1.50 leftover from each parent. Then you give each of them $1 back, so now your total "spent" is $48.50x2, which is $97, plus $2 ($1 to each parent). You have then spent $99. You keep $1.
eta: The *original* math is wrong. The shirt didn't cost $48 from each parent. It cost $48.50 from each of their $50. That's where the "missing" dollar is. This stupidity is making my head hurt.
You don't need to add the $1 that you took. It is included in the $49 you owe each of your parents.
You borrow $50 from each of your parents ($100) You buy your shirt -$97 =($3). You give $1 each back to your parents = ($1)
What you owe your parents is $50 - $1 each, ($49x2) = $98. The dollar that you took **is included in the $98**. So, $98 plus the $2 that you gave your parents =$100.
You don't need to add the $1 that you took. It is included in the $49 you owe each of your parents.
You borrow $50 from each of your parents ($100) You buy your shirt -$97 =($3). You give $1 each back to your parents = ($1)
What you owe your parents is $50 - $1 each, ($49x2) = $98. The dollar that you took **is included in the $98**. So, $98 plus the $2 that you gave your parents =$100.