Question

what should we added in a-b to get 3a+b​

Answer 1

Answer:

Step-by-step explanation:

2a+2b should be added.

a-b+2a+2b=3a+b

Answer 2

$\bold{Solution:}$

To find, the thing that should be added to a-b to get 3a+b

$\underline{Let\:X\:be\:added\:to\:it.}$

=> a-b+x=3a+b

or, x = 2a +2b

$\boxed{Hence,\:2a+2b\:be\:added.}$