On Saturday, Kelly borrowed $15 from her sister. The next day, she paid back $4. On Tuesday, she borrowed $9 more. How much money does Kelly now owe her sister?

20$ owed back

Step-by-step explanation:

Let's understand this sentence by sentence.

On Saturday, Kelly borrowed $15 from her sister. The next day, she paid back $4. On Tuesday, she borrowed $9 more. How much money does Kelly now owe her sister?

"On Saturday, Kelly borrowed $15 from her sister." That means that she owes 15 dollars to her sister right now.

"The next day, she paid back $4." That means that she is now 4$ less in debt. So in total, she is 11$ in debt now. (Is that actually real debt?)

"On Tuesday, she borrowed $9 more." That means that she owes even more money again. To be precise, 9$ more.

So 11$ + 9$ = 20$ owed

20$ owed at the end