The sum of a number and negative 20 is 40 what is the number

You can rewrite this as: x + (-20) = 40, which is another way of writing

x - 20 = 40

Then, you add 20 to both sides of the equal sign to get:

x = 60

Therefore, the number is 60.

Hope this helps.

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.