Help with homework :(

[FuLouZero]

ermm my problem is this
2/3x - 4 = 10

I know the answer but I got 15 others I dont know and how to do it. Any one know how?

 

[magic_mushrooms]

u see add the opposites...........make that -4,add 4 to each side,so u get


3/4x=14


make the fraction 4/3x,and times it by both sides

4/3 (x)times(x) 3/4, so on the other side 10/1 4/3 so it would make 40/3,then how many times does 3 go into 40,it would be 13 1/3

 

[DB]

Originally posted by magic_mushrooms
u see add the opposites...........make that -4,add 4 to each side,so u get


3/4x=14


make the fraction 4/3x,and times it by both sides

4/3 (x)times(x) 3/4, so on the other side 10/1 4/3 so it would make 40/3,then how many times does 3 go into 40,it would be 13 1/3

You're wrong, because he is multiplying the variable time 2/3 not adding it.

 

[Kuro Neko]

You shouldnt be asking math problems on a video game forum, because all we know basically is the main numbers, followed by HP or MP.

Its a contridiction, no one except CrookedFoot or Galatia would know that one.

 

[magic_mushrooms]

whoa sorry
he just wanted help not the answer ,either way if that was case it would of been right.

 

[DB]

Originally posted by Fu_lou
ermm my problem is this
2/3x - 4 = 10

First off, you must elimate the 4 on the left side by adding it to both sides.


2/3x = 14


Now, you must remove the 2/3 on the left side by dividing it by both sides.

x = 21

 

[magic_mushrooms]

SHOW UR WORK !!!! hate my math teachers

 

[Spirit-Reaper]

Who needs math? Isn't that why the calculator is around?

 

[magic_mushrooms]

fu do u listen to the unseen? i realized ur lil letters under ur name ,and thats a name to a song from explode.....

 

[MacMan]

Is it (2/3)x or 2/(3x), we can't solve it unless you clarify that: there's a BIG difference.

edit: meh, both cases here (these are correct, don't doubt):

The long way:
2/(3x) - 4 = 10
+4
2/3x = 14
*3x
2 = 14(3x)
/14
1/7 = 3x
/3
1/21 = x

The long way:
(2/3)x - 4 = 10
(2x)/3 -4 = 10
+4
(2x)/3 = 14
*3
2x = 42
/2
x = 21

 

[magic_mushrooms]

you seriously sound like my math teacher...

 

[battle plans]

Originally posted by Spirit-Reaper
Who needs math? Isn't that why the calculator is around?

TRUE THAT i tell my math teacher that everday lol

 

[nonl33t]

wait i think the answer is
2/3x - 4 = 10
2/3x - 4+4 = 10+4
2/3*3x=14*3
2-2x=42-2
x=40
i think not entirely sure though but i hope so cuz this is what im doing in math now (well b4 the march break) and if i dont know this then somethings wrong cuz my teacher spends half the day each day on this which get so <insert extremely sever obscenety her> boring

 

[Master.America]

2/3x - 4 = 10 // original equation

2/3x - 4 = 14 // add 4 to each side to get this

(3/2)(2/3)x = 14 (3/2) // to isolate x, you'll need to multiply x's coefficient (2/3) times its reciprical (3/2). In other words, multiply both sides times 3/2.

x = 42/2 // 14 times 3/2 equals 42/2, or 21.

x = 21

That's your answer.

Follow the order of operations (PEMDAS) in reverse order. Adding and subtraction first, then division and multiplication, then exponents, then everything enclosed in parentheses and brackets.

nonl33t, what you did wrong is when you tried to multiply 3/2 times both sides. You multiplied the side on the right times 3 and left the denominator (2) on the left. What you should have done is turned the 2/3 upside-down so that you could multiply it by both sides (2/3 cancels out with 3/2, leaving x by itself)

 

[OMGLOLWTFPWN]

Macman you got two different answers...

2/3x - 4 = 10 x3

2x - 12 = 30 +12

2x = 42

x=21

There.

 

[x42bn6]

Just..... OMG.....

How old are you, Fu_lou? >_<

 

[OMGLOLWTFPWN]

I don't think he is in high school yet.

 

[MacMan]

Macman you got two different answers...

What he posted can be read as "two-thirds x," or "two over three x," there's a difference.

 

[ShaftedTwice]

Geesh.. LoL, Im in Pre-Algebra.. (8th Grade)

What is so weird is that we had these SAME EXACT type of problems today in our lesson.. Sheez, they took me forever.. (I mostly guessed..)