Question

help sorry too confused + Fan + Medal

Answer 1

http://static.k12.com/bank_packages/files/media/mathml_0490b13d8d6bc8f13e115d9397869ae11698f032_1.gif

Answer 2

To start, let's try to get all the x terms on one side and all the constants on the other. Can you do that for me?

Answer 3

aren't them all ready on one side?

Answer 4

The x terms are on the left, but the 6 needs to go to the right to join the 18.

Answer 5

oh so I subtract 6 on both sides?

Answer 6

Correct.

Answer 7

You will have:
\[-(2/7)x + (/17)x = 18 - 6\]

Answer 8

Sorry, that's a 1/7x.

Answer 9

Are you following?

Answer 10

ya

Answer 11

Let's evaluate both sides. 18-6 is 12. Then on the left we have
\[-(2/7)x + (1/7)x\]

Answer 12

So now evaluate that left side.

Answer 13

hello @IParke

Answer 14

Did you get an answer?

Answer 15

am confused on this part

Answer 16

Okay, no problem.
You need to add (-2/7) + (1/7).

Answer 17

1/7 ?

Answer 18

That becomes your coefficient of x. The coefficient is the constant value in front of a variable.

Answer 19

In this case, it is -1/7

Answer 20

Do you see why?

Answer 21

yes

Answer 22

Okay. Great.
So now you have:
\[-1/7x = 12\]

Answer 23

Our goal now is to get rid of that coefficient, the -1/7, in front of the x. What should we do to both sides to get rid of the -1/7?

Answer 24

add 1/7 to both sides

Answer 25

We should divide both sides by -1/7.

Answer 26

The reason for that is because we want to get rid of the number multiplying x. If we divide that number by itself, we get 1. -1/7 divided by -1/7 is 1. 1 times X is X.

Answer 27

Is this clear?

Answer 28

yes i with ya

Answer 29

So go ahead and divide both sides by -1/7 to get your final answer.
X=?

Answer 30

1.71428571429

Answer 31

@IParke

Answer 32

12/(-1/7) = -12/(1/7) = -(12*7)/1 = -84

Answer 33

so x =-84

Answer 34

thanks @IParke

Answer 35

Correct. No problem. If this still doesn't make sense to you, please let me explain.

Answer 36

it is ok thanks