Jeremy is 14 years old. This is 9/2 years more than half his sister's age. How old is his sister?

Question

i need help to find the answer to this problem.

Answer 1

The equation looks like this:

14 = 9/2 + s/2, where s is for the sister's age.

 

What we need to do is isolate s:

14 = 4.5 + s/2

Subtract 4.5 to both sides:

9.5 = s/2

Multiply both sides by 2:

19 = s

 

So Jeremy's sister is 19 years old.