Question

67 X 46 X 56

Answer 1

@agent0smith

Answer 2

@iambatman

Answer 3

this history not math

Answer 4

repost in math please

Answer 5

Since we're given n, we can plug it into the equation.
2n + 3m = 7
Plug n in.
2(5) + 3m = 7
10 + 3m = 7
We need to isolate the variable on one side. So subtract 10 from both sides.
10 + 3m = 7
- 10 -10
3m = -3
Divide each side by three to get the value of m.
3m/3 = -3/3
m = -1
You can plug in -1 to check you answer.
2n + 3m = 7
2(5) + 3(-1) = 7
10 + (-3) = 7
7 = 7
There we go. Understand now? (:

Answer 6

@BunnyBree you subtracted 10 -10 and got zero and then 10 - 3? but what about 10 - 7 confused...

Answer 7

You don't subtract 10 by the 3m. Only by itself and the 7. I had to subtract 10 from each side for two reasons.
Reason 1: I needed to isolate 3m on one side.
Reason 2: Subtraction is the opposite of addition, and since 10 is positive, I needed to do the opposite.

Answer 8

could you give em a practice question so I can see if I got it?

Answer 9

@BunnyBree ?

Answer 10

I mean could you give me a practice question

Answer 11

Sure. Try: 3m - 2n = 13 when n = 1

Answer 12

3m = -11 ? I got stuck after that

Answer 13

Okay. Let me break it down. (:
3m - 2n = 13
We have n already, so lets plug it in.
3m - 2(1) = 13
3m - 2 = 13
Since 2 is negative, we need to add.
3m - 2 = 13
+ 2 + 2
3m = 15
Can you solve it from here?

Answer 14

Scroll up and see how I answered the first question. It should provide help!!

Answer 15

oh man what did i do wrong :((

Answer 16

@BunnyBree

Answer 17

Don't feel discouraged!! Math is a very difficult subject. Mistakes happen. (:
Just see what you did wrong and fix it.

Answer 18

Don't listen to @BunnyBree She is incorrect !

Answer 19

And how so? @Stormie

Answer 20

2n + 3m=7 find m when n = 5
Do the math on paper... no calculator !

Answer 21

I actually do the math so your incorrect. =P

Answer 22

How did you get -1?

Answer 23

I'm not talking about the stupid practice. I'm helping on the original equation that actually needed help and if your smart you would do it yourself and get the correct answer.

Answer 24

Wait. Nevermind. I got -1 too. So how it incorrect??

Answer 25

*is

Answer 26

No, I didn't. READ EVERYTHING.
Since we're given n, we can plug it into the equation.
2n + 3m = 7
Plug n in.
2(5) + 3m = 7
10 + 3m = 7
We need to isolate the variable on one side. So subtract 10 from both sides.
10 + 3m = 7
- 10 -10
3m = -3
Divide each side by three to get the value of m.
3m/3 = -3/3
m = -1
You can plug in -1 to check you answer.
2n + 3m = 7
2(5) + 3(-1) = 7
10 + (-3) = 7
7 = 7
There we go. Understand now? (:
I PUT IN 7 TO CHECK THE ANSWER. NOTICE THAT I PUT M = -1?

Answer 27

You did the math the harder and longer way....

Answer 28

Which confused her.

Answer 29

No, I didn't. I could have easily stopped at the answer, but I wanted to show her that -1 was correct so it could help her. Checking your answer never hurts.

Answer 30

I never said that you shoudln't check you answer...
I'm saying that you took a harder time describing what to do for as I did the math the shorter way and made it a lot more easier

Answer 31

She wanted us to go "in depth" which means explain step by step.

Answer 32

Rules number one of math: If your good then you could find shortcuts and do it much more quicker. -_- By the way I did go "in depth" of the problem silly.

Answer 33

Your not a good enganger are you.

Answer 34

You really didn't. And stop implying that I'm not good at math. I've been in honors math all my life. (;

You have to do things more slowly and in depth when trying to explain something rather than just doing the answer, so people actually LEARN.

You did the steps. However, you didn't explain what you were doing all the way through.

Answer 35

Now I'm done here. I'm not going to argue with someone on the internet. Especially when I know I'm not in the wrong.

Have a good evening. Goodbye.

Answer 36

@bunnybree ok

Answer 37

ok so no matter what the 2 cancels out ?

Answer 38

m - 2n = 13 We have n already, so lets plug it in. 3m - 2(1) = 13 3m - 2 = 13 Since 2 is negative, we need to add. 3m - 2 = 13 + 2 + 2 3m = 15

Answer 39

is it 5? @dan815

Answer 40

is it 5 @iambatman

Answer 41

the second problem..not first

Answer 42

m - 2n = 1?

Answer 43

What's n?

Answer 44

so I did not get it right?

Answer 45

I don't know what your question is, please specify.

Answer 46

3m - 2n = 13 n = 1

Answer 47

I mean 3 not 5

Answer 48

nevermind confused again

Answer 49

Uhg I wasn't able to click on equation bar...alright.

So plug in n = 1, and I'm assuming you're solving for m.

\[3m - 2(1) = 13 \implies 3m - 2 = 13\]
add 2 on both sides so the 2 gets cancelled on the left.
\[3m-\cancel2+ \cancel2=13+2 \implies 3m = 15\]

now since we have 3m = 15, you see the 3, I like to say is "stuck" onto the m, meaning it's being multiplied, and if we want m on its own, we need to do the opposite operation on both sides to get just the m. So what's the opposite of multiplying? Division right?

Lets try that.

\[3m = 15 \implies \frac{ \cancel 3m }{ \cancel 3 } = \frac{ 15 }{ 3 } \implies m = 5\]

Therefore you were right :)

Answer 50

omg yesssssss it took so long. do you mind giving me another practice question? I wanna do one more

Answer 51

Great, so that all made sense? :)

Answer 52

Alright how about this question...(I'm just making these up, I'll figure out the answer as you're doing it :P).

5k-3k+3=36p, solve for k when p = 6.

Answer 53

Even if you don't get it, don't worry we can go over it step by step :)

Answer 54

i only understood 5k - 3k + 3 = 216 ..... I did'nt know which k value I was suppose to use because thier was 2 so I just got stuck

Answer 55

Treat them as you would a regular number, 5k - 3k = 2k

Answer 56

Don't let the variables scare you, it is probably how you imagine it is :)

Answer 57

but Idon't know what number I'm supposed to pick to add to both sides...that's why I'm confused :(

Answer 58

or do I just go ahead and subtract because they both have k values?

Answer 59

What do you mean? We 5k-3k = 2k
It's like saying 5 - 3 = 2, so now use 2.

Answer 60

Yes extactly!

Answer 61

but what if they did'nt?

Answer 62

Then you can't do anything.

Answer 63

oh ok:)

Answer 64

Unless another variable was given :P

Answer 65

5 = 216?

Answer 66

@iambatman did I do something wrong?

Answer 67

Wait why did you put 5 = 216?

Answer 68

What happened to the k

Answer 69

oh 2k+ 2..cancel out?

Answer 70

and 3 + 2 = 5

Answer 71

oh it's 1 isn'tit

Answer 72

Ok so we're given 5k-3k+3=36p

and p = 6

So 5k-3k +3 = 216
minus 3 on both sides
5k-3k +3-3 = 216-3
5k-3k = 213
2k = 213
now divide by 2, k = 213/2.

Answer 73

but i thought it was + 2? 5k - 3k = 2k?

Answer 74

ohhhhhhho ok

Answer 75

656 with remainder of 6

Answer 76

@iambatman

Answer 77

I mean 6 with remainder of 656

Answer 78

Well you can leave it as it is, you don't have to solve it like that lol, but it's actually ~ 106.