[Acta Non Verba]

Ok, when I was revising rearanging algebra I was fine. I got every question right, but then when I did the test I got nearly every question wrong. The above picture is a page from the test. Allow me to give you an example:

3)
P= T+5/T

So, you should times the right hand side by T. That would give

P+T = T+5
Then I have two problems:
No.1 - bring over either of the T's will mean that there are no T's, but according to the question I should have some left (at least one) when I'm done.

No.2 - From the way I've worked it out, no two numbers of letters times together, which means that there's no way I could turn the answer back into a fraction.

Thanks for any help.

[addylad]

Useful tip: get off MyMaths!

[yesioo]

Useful tip: get off MyMaths!

Tell me more...

Halp? Stack? Made me laugh. I'm turning into a spelling snob. I'm actually having trouble with the same thing OP.

[Higgy90]

when you multiply both sides by t you dont get p + t....

[charlie123]

haha spelling should be your priority rather than maths

[MathsHamster]

no, you get pt= t + 5

good ol' mymaths

[shanekeane]

p multiplied by t is pt, not p + t. So you have pt = t+5. Then t(p-1) = 5. Therefore, t = 5/(p-1)

[addylad]

Hmm doesn't look as if you can factorise coz you would get t(p-t)

[addylad]

This.

Edit: didn't quote, shanekeane up there I was talking about ^^

[skittlesftw]

Originally Posted by addylad

Hmm doesn't look as if you can factorise coz you would get t(p-t)

tp-t = t(p-1)

[Acta Non Verba]

Oh.

How silly of me.

Cheers.

[99ScottD99]

No, all wrong, you get pt=t^2+5

[130ss]

Originally Posted by charlie123

haha spelling should be your priority rather than maths

Haha. Grammar should be yours.

[addylad]

Originally Posted by 99ScottD99

No, all wrong, you get pt=t^2+5

That doesn't get you anywhere though.

[GHOSH-5]

Originally Posted by 99ScottD99

No, all wrong, you get pt=t^2+5

No, you're wrong.

[99ScottD99]

You have to times both 'sides' by t, not just pick and choose, so it's essentially going from P=t+5/t to t(P)=t(t+5/t) which then simplifies to Pt=t^2 +5
However, not really sure where to go from there

[jink]

t(t + 5/t) is t + 5, not t^2 + 5.

[Linda and Suzanne]

Originally Posted by 99ScottD99

No, all wrong, you get pt=t^2+5

Originally Posted by GHOSH-5

No, you're wrong.

Originally Posted by Acta Non Verba

P= T+5/T

Well, the OP was presumably sloppy.

Given what OP actually posted 99ScottD99 was right but you wouldn't get that in a GCSE rearranging question.

However the image shows

Why can't people use Latex? They all say "I don't know Latex" or "I can't do Latex". You can learn.

Sorry about the rant.

Anyway



Multpily by T



Subtract T



Factorise



Divide by P-1



The thread seemed to have become confused so we thought a full solution would be OK.

[99ScottD99]

Thank you!