Vanity: Are you smarter than a 7th grader? (Need help with my kid's algebra homework)

[Maceman]

The problem is:

3-4x = 6X+13

Can someone (please) demonstrate how to solve this? (I always was terrible at math).

Thanks.

[proxy_user]

Ach, I see what I did wrong. Had myself worried there for a minute. I’m going to bed.

[aruanan]

3-4x = 6X+13

Didn't we just have this a few days ago?

3-4x = 6x+13
-4x-6x =13-3
-10x = 10
x = 10/-10
x = -1

[RaceBannon]

hey, wait, you didnt declare a or b as variables that wont work!

:)

[jmax]

I couldn’t pass algebra, so I became an Electrical Engineer. : )

[FlyingEagle]

Either you are right, or else the answer is 42.

[Slump Tester]

Ha-ha! Peace through superior firepower, huh?

[PrinterEagle]

[RnMomof7]

When my eldest was in 7th grade I decided to go to a nearby college and take a college math class so that I could remember everything I had long forgotten , I was never sorry I did that ...

[RnMomof7]

You worked it as I would have..we must have had the same beginning algebra book :)

[builder]

very concisely stated !

[ProtectOurFreedom]

If I were you, I’d go the long-way round using an Inverse Matrix with Gauss-Jordan Elimination. It’s much more fun that the solutions proposed by others.

[ProtectOurFreedom]

In a similar vein...

[Left2Right]

That Khan academy is great! Thanks for the link!

Just got done watching the video on Partial Fraction Expansion (now I really feel like a nerd, but I’m smarter!).

[Condor51]

*** So classic: x = 5cm ***

Yep. The old; '3,4,5 rule'

sorry for day late comment, I just saw the thread.

[thatjoeguy]

I’m an accountant, what do you want it to be? /s

[RoosterRedux]

I've done all the algebra and trig and now into calculus.

It is so much better when you are older and know how it applies to life.

BTW, I hear Khan is going to produce a huge, comprehensive effort aimed at computer programming...stay tuned!

[RoosterRedux]

Another point. Kahn says that everyone is good at math...some people just have poor teachers.

[Pan_Yan]

LOL. Much better that you found it than having someone else point it out.

[BuckeyeTexan]

Dr. Pepper - right through the nose - it hurts. Dang that was funny.