Question

what should added with A to get B​

Answer 1

Answer:

$x + a = b \\ \\ x = b - a$

ADD. B - A

Answer 2

Answer:

$\text{-A+B}$

Step-by-step explanation:

We are given a arbitrary variable A

we have to find an number so that when it added to A returns B.

Solution :

Let the required number is  'x' .

According to the question :

$x+A=B$

transfer A to the right hand side to get the value of 'x'

$x=B-A$

Hence the required number is 'x'

B-A added to A returns B.

#SPJ2