Who understands Maths (serious question) HELP TREV!

[Agent David]

Is there anyone out there that can help me understand equations? They are pretty basic i'm sure but cant quite get the hang of them. If anyone says they can i'll post up the equation that is giving me problems. Thanks in advance.

[Ben Purnell]

I'd like to think I do, but no guarantee though as its been a while

[Nick-kx125]

Post it and I'm sure you'll get an explanation!

Regards

[cosmo]

Wop it up Dai

[Bergcup435]

what type of equation is it?

post up an example

[Agent David]

Ok, i've been asked to simplify the following:

7t - (-3v) - 4v - (-9t)

and also this one:

8x - 5y - (-y) + 3x


HELP, i don't understand it. Although i know the answer, it's in the back of the book lol, but the workings aren't included so i don't really know how to get the answer and the workings are as important as the final answer.

[TREVCOS]

My answers would be:

16t – v

11x – 4y

But that's just me.....

Now turn your papers over and leave quietly.

[Agent David]

My answers would be:

16t – v

11x – 4y

But that's just me.....

Now turn your papers over and leave quietly.

Congratulations, now can you show me your workings please.

[TREVCOS]

Congratulations, now can you show me your workings please.

7t - (-3v) - 4v - (-9t)

Take the t's first. You have a + 7t and a -- 9t (which is a plus) which makes 7t + 9t = 16t

Then take the v's. You have - -3v (which is +3v) - 4v = -1v = -v

so 16t - v



and also this one:

8x - 5y - (-y) + 3x

And in this one

Take the x's first

You have 8x + 3x = 11x

and you have -5y -- (which is a plus) y = -5y + y = -4y

So 11x - 4y

Does that make sense at all?

[Agent David]

So you are saying that the answers aren't 16t minus (as in subtract) v. It's just simplified down to show the individual values of t and v? Does that make sense?

[TREVCOS]

So you are saying that the answers aren't 16t minus (as in subtract) v. It's just simplified down to show the individual values of t and v? Does that make sense?

Oh no, it is subtract, but it's just taking what you've got and making it into a simpler equation, i.e. where you've got more than one part using the same letters etc trying to bring those together so you don't have them more times than you need to.

[TREVCOS]

So you are saying that the answers aren't 16t minus (as in subtract) v. It's just simplified down to show the individual values of t and v? Does that make sense?

Actually my workings are displayed slightly wrong, give me a sec.

[TREVCOS]

Just have a look where I've highlighted and see if that makes more sense now.

[Agent David]

That does make more sense. As said, the answers are in the back, but not the workings and i need to see workings to understand where i'm going wrong. The examples were pretty basic as well. Thanks very much. I'm sure there will be worse to come but i'll know where to come when i get stuck.

[Dave H]

Well in there Trev give yourself a pat on the back