6
Add
There is nothing that you can do when you combine like terms that you cannot do without combining them. Some procedures might be easier, though, if like terms are combined.
When they have the same variable.
Combine 'like' terms.
456
-k + 3k = 2k
6
In mathematical terms, factor pairs are numbers that combine to create a given product. The factor pairs of 12 are (12,1)(6,2)(4,3)
You can combine like terms - combine the terms that have a "t" in them; separately, combine the terms that don't.
To add like terms, find the terms that have the same (or no) variable, and combine the coefficients of the terms. For instance, if you have a+b where a and b are real numbers, you can combine them.
To simplify
no, combining like terms means combine the terms that are the same 15+x+6+x=28 combine like terms 21+2x=28 2x=7 x=3.5
yes
Add
There is nothing that you can do when you combine like terms that you cannot do without combining them. Some procedures might be easier, though, if like terms are combined.
To combine terms