i am not clear about combining like terms can you please help me understand?

Devora,

When you see problems like you posted 3a+4b-3a-b, sometimes it is easier to see them separately.

For example: 3a+4b-3a-b

Can be viewed as:

3a

4b

-3a

-b

and since there is no multiplication or division involved you can perform this in any order you want. So you could rewrite the equation like this: 3a-3a+4b-b.

3a-3a is 0 so now we can rewrite the equation like this: 4b-b. Then we just finish simplifying 4b-b= 3b.

I hope this helps, if yo have any questions let me know.

## Comments

to see them seperatly helped thx!

I am glad it helped, happy to help anytime.