Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    11
    ReputationRep:
    (2x+1/2)/3 -1/2=(y-1)/2

    3x-4y=1

    plz help with this simultaneous equation
    Offline

    3
    ReputationRep:
    (Original post by p29)
    2x+1/2
    ------------ -1/2=y-1/2
    3
    What exactly do you have to do? Find x in terms of y, or find y in terms of x?
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by HapaxOromenon3)
    What exactly do you have to do? Find x in terms of y, or find y in terms of x?
    find what x and y is
    Offline

    2
    ReputationRep:
    (Original post by p29)
    2x+1/2
    ------------ -1/2=y-1/2
    3


    plz help with this simultaneous equation

    is it (2x+ 1/2)/(-1/2) = y - 1/2??????????????? if not please can you write it this way?
    Offline

    3
    ReputationRep:
    (Original post by p29)
    find what x and y is
    You have two variables but only one equation, so there are infinitely many possible values of x and y.
    • Thread Starter
    Offline

    11
    ReputationRep:
    omg i forgot to write the second equation
    • Thread Starter
    Offline

    11
    ReputationRep:
    plz help this is an equation from hell
    Offline

    3
    ReputationRep:
    (Original post by p29)
    omg i forgot to write the second equation
    OK, now we can solve it. Rearrange the first equation as (2x+1/2)/3 = y/2, and multiply by 6 to give 2(2x + 1/2) = 3y -> 4x - 3y = -1.
    Now 4x - 3y = -1 becomes 16x - 12y = -4
    And 3x - 4y = 1 becomes 9x - 12y = 3
    So subtract these to give 7x = -7, i.e. x = -1, so -4 - 3y = -1 -> -3y = 3 -> y is also -1.
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by HapaxOromenon3)
    OK, now we can solve it. Rearrange the first equation as (2x+1/2)/3 = y/2, and multiply by 6 to give 2(2x + 1/2) = 3y -> 4x - 3y = -1.
    Now 4x - 3y = -1 becomes 16x - 12y = -4
    And 3x - 4y = 1 becomes 9x - 12y = 3
    So subtract these to give 7x = -7, i.e. x = -1, so -4 - 3y = -1 -> -3y = 3 -> y is also -1.
    thank you!!!
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by ArafatQ)
    My hand writing isn't particularly neat but here is the answer. Let me know if you need clarification.
    Attachment 578056
    Attachment 578056578058578000
    thank you!!!!
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Has a teacher ever helped you cheat?
    Useful resources

    Make your revision easier

    Maths

    Maths Forum posting guidelines

    Not sure where to post? Read the updated guidelines here

    Equations

    How to use LaTex

    Writing equations the easy way

    Student revising

    Study habits of A* students

    Top tips from students who have already aced their exams

    Study Planner

    Create your own Study Planner

    Never miss a deadline again

    Polling station sign

    Thinking about a maths degree?

    Chat with other maths applicants

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Write a reply...
    Reply
    Hide
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.