You can combine like terms - combine the terms that have a "t" in them; separately, combine the terms that don't.
There are no like terms here.
You combine like terms.
3x + x = 4x
Combine like terms, meaning add 12X plus 4X which is 16X and then you add 25Y plus 15Y which equals 40Y so the answer will be 16x+40y. combine like terms means add the ones with the same variable.
12t + 15
combine like terms do you get: 9x-3. that's as simplified as it can be.
Combine like terms to give 3n + 2
Combine like terms. 6x - 2y +7.
-5xy2 + 12xy2 = (-5 + 12)xy2 = 7xy2