[mrsmith]

Use ‘the scientific method’ :

Toss the teacher into water.
If she doesn’t drown she’s possessed and you’ll have to burn her of course.
If she drowns- well- at least you won’t have to spend valuable drinking time doing kid’s homework anymore.

[BuckeyeTexan]

Obviously others have provided the answer, but what you need to understand is how to solve an equation. It’s an equation because both sides are equal, right?

So what you do to one side of the equation, you must do to the other side of the equation to keep it “equal.”

So to simplify the equation, move the whole numbers to one side and the unknowns (x’s) to the other.

You can move the 3 or the 13 first. It doesn’t matter which one, just pick one. To remove the 13 from the right side, subtract it. Since both sides must remain equal, you must subtract 13 from the left side too.

That leaves:

3 - 4x - 13 = 6x + 13 - 13

which is:

-10 - 4x = 6x

Now move the 4x from the left side to the right side. To do so, add 4x to both sides:

-10 - 4x + 4x = 6x + 4x

which is:

-10 = 10x

So 10 times what equals -10?

x = -1

(Last step is dividing both sides by 10 to move the 10 from the right side to the left side.)

[reaganaut]

I see you got the help you needed. One of the things I love about Freep is that people post threads like this.

[ALPAPilot]

Because Algebra is an arabic word, I refuse to do it on religious grounds. But I think the derivative of x is zero.

[DTogo]

Algebra: invented by ancient geeks who couldn't figure out what the "Y" was.

"Yeah, well, your girlfriend might look hot in her toga, but I know what "X" is!"

Pfffffft!

[RaceBannon]

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

[CapnJack]

Math is easy. Just watch these experts and you’ll learn a lot ...

http://www.youtube.com/watch?v=rLprXHbn19I

[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

[jmax]

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

[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 ...

[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.

[thatjoeguy]

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