Question

What must be added to m+n-p to make m-n-p?

Answer 1

Answer:

11 must be added to m+n-p to make m-n-p.

Answer 2

Answer:

-2n

Step-by-step explanation:

In order to see what to add to (m+n-p) to get (m-n-p), let us first subtract (m-n-p) from (m+n-p).

The difference would be the answer to the question.

∴ (m-n-p)-(m+n-p)

= m-n-p-m-n+p .............. the signs of (m+n-p) will reverse because of the (-) sign in front of it

= -2n

∴ -2n should be added to (m+n-p) to get (m-n-p)