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

    3
    ReputationRep:
    Hi,

    So I'm looking to rearrange the equation to make g the subject:

    2x= (g/g-2) -5

    I don't know how to work this out, can anyone help?
    • TSR Support Team
    • Very Important Poster
    • Welcome Squad
    Offline

    20
    ReputationRep:
    (Original post by Drax101)
    Hi,

    So I'm looking to rearrange the equation to make g the subject:

    2x= g -5 g-2

    I don't know how to work this out, can anyone help?
    What is between the 5 and second g?
    • Community Assistant
    • Study Helper
    Offline

    20
    ReputationRep:
    (Original post by Drax101)
    Hi,

    So I'm looking to rearrange the equation to make g the subject:

    2x= g -5 g-2

    I don't know how to work this out, can anyone help?
    What have you tried so far? Please post your working.
    Offline

    17
    ReputationRep:
    If you need a nudge to start off, try getting all the g terms on one side and everything else on the other.

    Then get everything on one line (no fractions).
    • Thread Starter
    Offline

    3
    ReputationRep:
    Ok here is my solution:

    g/g-2 = -2
    2x-5= 5-2=3x

    As stated, no idea. I appreciate your guidance.
    Offline

    22
    ReputationRep:
    (Original post by Drax101)
    Ok here is my solution:

    g/g-2 = -2
    Not sure where you're getting this from...

    Try this: \frac{g}{g-2} = 2x + 5

    Then multiply both sides by g-2, expand and then move all g terms back to the left, factorise and then divide.
    Offline

    17
    ReputationRep:
    (Original post by Drax101)
    Ok here is my solution:

    g/g-2 = -2
    2x-5= 5-2=3x

    As stated, no idea. I appreciate your guidance.
    How did you get two equations when you start with one? What is your working here?

    Try adding 5 to each side of the equation to begin.
    Offline

    2
    ReputationRep:
    g=(4x+10)/(2x+4)
    This is what I ended up with


    Posted from TSR Mobile
    Offline

    17
    ReputationRep:
    (Original post by H.b9)
    g=(4x+10)/(2x+4)
    This is what I ended up with


    Posted from TSR Mobile
    Correct, but you can simplify by dividing numerator and denominator by 2.
    Offline

    22
    ReputationRep:
    (Original post by chazwomaq)
    Correct, but you can simplify by dividing numerator and denominator by 2.
    Not the OP.
    Offline

    17
    ReputationRep:
    (Original post by Zacken)
    Not the OP.
    Sure, still almost correct though! Hopefully the OP isn't still puzzling her way through the question.
    Offline

    1
    ReputationRep:
    (Original post by Drax101)
    Hi,

    So I'm looking to rearrange the equation to make g the subject:

    2x= (g/g-2) -5

    I don't know how to work this out, can anyone help?
    g/g-2 = 2x+5 -> g=(2x+5)(g-2)=2xg-4x+5g-10
    Thus (2x+5-1)g=4x+10 -> g = (4x+10)/(2x+4)=(2x+5)/(x+2)
 
 
 
  • 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
    Are unpaid trial work shifts fair?
    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

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