2 questions
when can you combine like terms?
when can you NOT combine like terms?

*just a guess*

you can combine like terms when they are using the same variables or constants. ex: you can combine 34x and 76x because of the variable

Byou start by adding them all and setting them equal to 180 since that is half of the total degrees in a circle.(2x+8) + (3x-14) + (3x-14) = 1808x-20 = 1808x = 200x = 25