So we will solve this like!
First of all out here we will place the like terms together and then to make it more simpler to work out we will place the terms which have like addition sign , together and subtraction sign together!
$$2a +3b -6b +8b -2b + 8a$$ ( and now we will place the like terms together)
$$2a + 8a + 3b -6b +8b - 2b$$ ( and now place them according to their signs to make it easy for us to solve, but out here we will add 2a and 8a becoz they are already placed in the right position)
$$10a + 3b + 8b - 6b - 2b$$ ( and now we will first add then subtract them , out here we are given -6b - 2b so as when there are two negatives they are to be added and so we will add them both)
$$=10a + 11b - 8b$$ ( and now we will simply subtract 11b and 8b)
$$=10a + 3b$$ $$ANSWER$$
I hope uve understood by now but if not then pls be free to ask!
i hope this helps!
+11912 
