Question

How do you solve `7/b=1/9`?

Answer 1

`b=63`

Explanation:

`7/b=1/9` is our equation, which we divide, multiply, manipulate, so long as we do it to both sides of the equation.

We can mulitply both sides by `b`:

i.e. `7/bxxb=b/9`;

`7=b/9`; and now mulitply both sides by `9`:

`7xx9=63=b`.