Question

Can Anyone help?

http://www.clipular.com/c?5976006=lJ-eT_bH6NAtMo91zx--w36k1Ck&f=.png



Ah! Thanks!! :3

Answer 1

Combine like terms. Add up all the coefficients (non variable numbers) with j after them and all the coefficients with k after them
8k + 12k - 4k = (8+12-4)k = 16k
15j + 6j - 3j = (15 + 6 - 3)j = 18j

So the correct answer is A

Answer 2

Combine together all terms that have k. Then combine together all terms that have j.
Terms that have the same variable, such as j, are called like terms and can be combined together. Terms with k can be combined together. Terms with j and terms with k are not like terms and can't be combined together.