Question

Phil had 93 dollars, and his sister owed 10 dollars to her friend. How much should Phil give to his sister for each of them to have the same amount after she paid her debt?

Answer 1

$51.50

Explanation:

Let the amount that Phil give to her sister be
`x`

After Phil's sister pays her debt of 10, Phil and her sister should have EQUAL amount. So we can write the equation as:

`93-x=x-10`

Now solving this for x, we have:

`93-x=x-10\\93+10=x+x\\103=2x\\x=(103)/(2)=51.5`

Hence, Phil must give $51.50 to her sister.