Question

How does the last step work? Anyone who can help is amazing!

Answer 1

Answer:

Step-by-step explanation:

When a number or variable passes through '=' sign then its symbol turns opposite.

EX: + turns to -

      × turns into ÷

And same the other way

So n-5=0

     n=5  

and n+6=0

       n=-6

Answer 2

Answer:

HOPE IT WILL HELP YOU . I TRIED MY BEST TO EXPLAIN YOU

Step-by-step explanation:

Hello mate

It is possible as there is 2 n

one is (n-5)

Another is (n+6)

So according to linear equations we have to find n from which the results is 0

So in the first n if we take n as 5 then (n-5) =5-5=0

In the second n if we take n as -6 then (n+6) =

-6+6=0

As the n never be negative or irrational so n is 5