Algebra question

[LostHiWay]

My algebra is horrible. How would I solve this equation for x:

(180s)/n - (360nr)/x^2

 

[Viper GTS]

Originally posted by: LostHiWay
My algebra is horrible. How would I solve this equation for x:

(180s)/n - (360nr)/x^2

You don't.

Viper GTS

 

[scorp00]

Originally posted by: LostHiWay
My algebra is horrible. How would I solve this equation for x:

(180s)/n - (360nr)/x^2

that's not an equation

5x = 6 is an equation you can solve. you need an equals sign.

 

[LostHiWay]

Originally posted by: scorp00

Originally posted by: LostHiWay
My algebra is horrible. How would I solve this equation for x:

(180s)/n - (360nr)/x^2

that's not an equation

5x = 6 is an equation you can solve. you need an equals sign.

Sorry forgot to set it equal to 0

So.. 0 = (180s)/n - (360nr)/x^2

 

[Orsorum]

Add (360nr)/x^2 to both sides, multiply both sides by x^2, divide by 180s/n, take the square root... should get x = + or - n sqrt (2r/s).

 

[eakers]

put one to the other side of the equals
cross mulitply
solve for x.

((and yes i know your teachers preach about the evils of cross mulitplying so i will say "mulitply each side by a common factor of (n)(x^2) to get rid of the denominators")

but really, it's cross mulitplying.

 

[dullard]

0 = (180s)/n - (360nr)/x^2

Move all the x's to one side:

(180s)/n = (360nr)/x^2

Look they are in the denominator, and we always solve things in the numerator, so multiply by x^2:

x^2*(180s)/n = (360nr)

Get rid of all the junk next to the x's:

x^2 =(360nr)*n/(180s)

Simplify:

x^2 =2n^2r/s

Now take the square root (remember squares give + and - answers):

x = +- (2n^2r/s)^.5

This can be simplified if you want:

x = +- n(2r/s)^.5

 

[LostHiWay]

Thanks guys

 

[kherman]

What grade are you in and should't you be in school right now?

 

[LostHiWay]

Originally posted by: kherman
What grade are you in and should't you be in school right now?

College Junior (Business major)...I swear I'm not an idiot, I just HATE math.

 

[DanTMWTMP]

Originally posted by: LostHiWay

Originally posted by: kherman
What grade are you in and should't you be in school right now?

College Junior (Business major)...I swear I'm not an idiot, I just HATE math.

aha i was wondering also....ah ic...

 

[Ausm]

Math isn't that hard...just have to be good at memorizing and also organization is critical

Ausm