Question

Solve each system of equations...
4w-v=15
-2w+6v=-2

Answer 1

First what you would do is multiply the bottom equation by 2, giving you:
4w-v=15
-4w+12v=-4

Now add the two equations together.. the w's would cancel:
11v=11
now divide
v=1

Now plug in v and solve for w
4w-1=15 (add one)
4w=16 (divide)
w=4

Answer 2

Thank you so much I have been trying to get help for at least a week now

Answer 3

Your welcome, do you understand what to do?

Answer 4

no it makes no sense to me at all.

Answer 5

Well there are 3 ways to solve these equations: By canceling, substitution, and graphing

Answer 6

It still makes no sense to me either way you are like the fifth person to try and explain this to me and it makes no sense

Answer 7

Is there any way I can make it simpler for you?

Answer 8

can you help me with this one?


-5m+3n=12
5m-8n=23

Answer 9

you can try actually but I don't know if it will help

Answer 10

What is one thing you could do? Can you cancel anything out?

Answer 11

the -5 and 5

Answer 12

Yes, so what does that leave us with when you add the two equations?

Answer 13

would you add or subtract it?

Answer 14

You always add the equations

Answer 15

so what's 3n+(-8n)? and 23+12?

Answer 16

ok so I got 11m=35

Answer 17

That's a -8n.. it's the same as 3n-8n..
so it would actually be -5n=35
Be careful with the positive and negative signs

Answer 18

yeah I figured that out

Answer 19

Okay, so now divide both sides by -5 to get the variable alone

Answer 20

ok so I got -7 I plugged that in and got 21n=12 and 56n=23

Answer 21

Yes, but all you have to do is just plug it in to just any one equation

Answer 22

ok so I still don't get the problem

Answer 23

-5m+3n=12
Plug in -7 into this equation as a substitution for n
-5m-3(7)=12
-5m-21=12
-5m=32
m=-5/32

Answer 24

my mistake that's suppose to be 33 not 32, sorry

Answer 25

ok wanna help me with another one haha

Answer 26

sure

Answer 27

ok


7j-3k=-14
2j+3k=32

Answer 28

ok I think I get this one Im just doing these numbers in a random order lol

Answer 29

Alright, so what did you get?

Answer 30

ok so I just got j=-2 and j=16

Answer 31

why did you get 2 answers for j?

Answer 32

idk

Answer 33

I'm sorry, I can't really help anymore..

Answer 34

ok