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Maths question - please help me help my son!!!

Discussion in 'Personal' started by pastychucker, May 22, 2011.

  1. Can you please give me a hint to help me work out this question...I don't want the answer..just PLEASE give me some idea how to work out,PLEASE
    For addressing envelopes Geraldine gets 10p per envelope plus £2 per day
    For addressing envelopes Bill gets 5p per envelope plus £20 per day
    One day they get paid the same for addressing the same number of envelopes - How many envelopes did they address?
     
  2. bombaysapphire

    bombaysapphire Star commenter

    Let n be the number of envelopes they both address. It will be easier to work in pence for everything.
    Geraldine gets 10n + 200
    Bill gets 5n + 2000
    These things are equal giving you an equation to solve for n.
    What year is your son? Has he been taught to solve and equation with the unknown on both sides?
     
  3. Bloody hell - he's Y9
     
  4. bombaysapphire

    bombaysapphire Star commenter

    Lol! Does that mean no?
    If you need help solving the equation then give me a shout but he might well have covered that by this stage of Year 9.
     
  5. He says he doesn't get it...teenagers are so helpful...
    So is it like 10 x n +200 =
    5 x n + 2000 =
    Sorry - its been a while since I did this stuff
     
  6. Then the equation should be very straightforward for him
     
  7. Further help would be appreciated..
     
  8. How about this

    G needs to make an extra £18 from envelopes

    she makes an extra 5p for each envelope

    How many 5p extras will make the £18?
     
  9. HA!!!!
     
  10. CarrieV

    CarrieV Lead commenter

    5n+2000=10n+200 ( when they both earn the same)
    subtract 5n from both sides
    2000=5n+200
    subtract 200 from both sides
    1800=5n
    n=360

    ( I hope!)
     
  11. Thank you everyone...much appreciated.
     
  12. bombaysapphire

    bombaysapphire Star commenter

    That's what I made it.
     
  13. CarrieV

    CarrieV Lead commenter

    Thank God for that! I had visions of making a complete idiot of myself[​IMG]
     
  14. *Pastychucker hopes son's maths teacher isn't on tes...*
     
  15. Hmm, I'm sure I set my year 9s a question on envelopes for homework...

    cyolba, obviously not teaching equations very well :)
     

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