Question

how do you do -6 - 2k + 11=18k

Answer 1

Well, first you have to do what's called 'combining like terms'. All constants, without 'k', are 'like terms'. They can be added together.

Answer 2

Similarly, the terms that have a 'k' can be added together.

Answer 3

So first, you combine the constants on the left -- what do you get?

Answer 4

Do you do 2k + 18k ?

Answer 5

yes, if you add 2k to both sides, then the right has 2k plus 18k. You also combine the non-k terms, called constant terms, on the left. What do you end up with then?

Answer 6

5?

Answer 7

exactly! So you have 5 on one side, and 20k on the other, right? Then divide both sides by 20, what do you get?

Answer 8

4?

Answer 9

Almost -- you're dividing 20 by 5, but you actually want to do the opposite. You have

20k = 5

So if you divide both sides by 20, you get

20k/20 = 5/20
k = 5/20
k = 1/4

Answer 10

thanks !