Question

How do you add `\frac { 4} { z } + \frac { 13} { 7z }`?

Answer 1

`41/(7z)`

Explanation:

We need to have the denominators be equal. We can do this by multiplying by a creative form of the number 1:

`4/z+13/(7z)`

`4/z(1)+13/(7z)`

`4/z(7/7)+13/(7z)`

`28/(7z)+13/(7z)`

`41/(7z)`