Question

5u + 3v = -16
2u + v = -8
Does the negative sign change to positive or stay the same when I add -16 and -8?

Answer 1

If so, -16 + -8 = 24 then 24/4 = 6 so v=6.

Answer 2

5u + 3v = -16 (1)
2u + v = -8 (2)
In order to solve the system, you need to multiply the second equation for 3 first

Answer 3

I'm sorry, I don't get it...

Answer 4

Just a moment I am trying to figure it out

Answer 5

I think I know....

Answer 6

In the previous one, it makes convenient that x terms are equal,
In this case you don't have it ready!

Answer 7

-6u - 3v = 24 correct?

Answer 8

Wow, fast learner :)

Answer 9

Now add the 2 equations to eliminate v, can you!

Answer 10

the new system of equations are: 5v + 3v = -16 and -6 - 3v = 24 ... I got -8

Answer 11

You're correct :)
u = -8

Answer 12

Just plug u= -8 back to the original equation

Answer 13

I believe so... 5(-8) + 3v = -16 correct? -16/-40 ? that doesn't look right... lol

Answer 14

Oh, use the original equation... 2(-8) + v = -8

Answer 15

.5? 2 x -8 = -16 so -8/-16, right? This part always confuses me.

Answer 16

2(-8) + v = -8
-16 + v = -8
--> v = -8 + 16 = 8

Answer 17

I see, I keep trying to solve for v like I did for u but I have to add 16 to the other side like you did in the previous equation.

Answer 18

Why don't you practice solve for V:
5u + 3v = -16

Answer 19

Okay!

Answer 20

v=24

Answer 21

5(-8) = -40, -16 +40 = 24 which is why I say v=24

Answer 22

You need to practice writing in Algebra way:
5u + 3v = -16
5 (-8) + 3v = -16

Answer 23

-> 3v = -16 + 40 = 24
=> v = 24/3 = 8

Answer 24

You're right, I do thank you...

Answer 25

I noticed that, it was a little sloppy on my paper as well.

Answer 26

Ahh, that makes sense! Okay. Thank you!

Answer 27

Feel overwhelmed now ;)

Answer 28

No, you've helped a lot thank you.

Answer 29

Keep practice, you learn fast :)

Answer 30

I will, thank you so much. :)