Question

How do you simplify `3/(x-4) * (x-4)/(12(x-7))`?

Answer 1

`1/(4(x-7)`

Explanation:

`3/((x-4)) * ((x-4))/(12(x-7)) " put in brackets "`

You may only cancel across or through a X sign, and NOT into a bracket - you may cancel a whole bracket. Cancel factors that are the same.

`cancel3/(cancel(x-4)) * (cancel(x-4))/(cancel12^4(x-7))`

`1/(4(x-7)`