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    I've been attempting some Edexcel New GCSE maths questions, and upon solving a question I happened to get a different (but similar) answer to the mark scheme, because there is more than one way of solving the question.

    The question and answer was:
    Name:  maths rearrange.png
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    But my answer was

    3r+7
    ------ = a
    2-r

    The difference in the methods was that I rearranged (ra) and (+7) instead of (3r) and (2a). Will I still get marks? The mark scheme does not mention my answer but I'm pretty adamant it's correct..
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    (3r-7)/(2-r) would be the only other correct answer. Yours is wrong, sorry.
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    (Original post by Alexion)
    (3r-7)/(2-r) would be the only other correct answer. Yours is wrong, sorry.
    Oh right thanks, looking back on my working I see where I went wrong.

    But if I wrote that in an exam would I get marks (as its not on the mark scheme)?
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    You've made a mistake with the sign- you carried the 7 over but didn't change the sign hence you've got the wrong answer
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    (Original post by Gabzinc)
    Oh right thanks, looking back on my working I see where I went wrong.

    But if I wrote that in an exam would I get marks (as its not on the mark scheme)?
    Whether you get any marks would probably depend on how many marks the question was- but I'd wager either 1 mark or none
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    (Original post by Poooky)
    Whether you get any marks would probably depend on how many marks the question was- but I'd wager either 1 mark or none
    I mean if I wrote 3r-7/2-r (which is also correct, not the mistake that I made)
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    (Original post by Gabzinc)
    I mean if I wrote 3r-7/2-r (which is also correct, not the mistake that I made)
    In that case you'd get full marks, both answers are the same (multiply your numerator and denominator by -1, you get the same answer as the mark scheme)
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    (Original post by Poooky)
    In that case you'd get full marks, both answers are the same (multiply your numerator and denominator by -1, you get the same answer as the mark scheme)
    Great! Thanks for all your help
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    (Original post by Gabzinc)
    I mean if I wrote 3r-7/2-r (which is also correct, not the mistake that I made)
    Yeah, if it's an equivalent answer you'd definitely still get the marks for it :yep:
 
 
 
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