Question

The sum of 16 and x is - 11.

Answer 1

I suppose you want to solve this for x.

The sum of 16 and x is
`16+x`

We want this sum to be -11, so we want

`16+x=-11`

When dealing with an equation, we can add the same number to both sides: if we add -16 to both sides (i.e. if we subtract 16 from both sides) we will solve for x:

`16+x-16=-11-16 \iff x=-27`