Question

How do you solve `7/5=x/3`?

Answer 1

`21/5`

Explanation:

In order to remove the `3` by which the unknown `x` is divided by, we must multiply by both sides of the equation by `3`, thus isolating `x`:

`7/5xx3=x/3xx3`

If both sides of the equation were not multiplied by 3, we would not maintain equality across the equation, thus reaching an incorrect answer.

Therefore, simplifying the above we get:

`21/5=x`