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Math Help - I know...I know another easy linear equation

  1. #1
    Member Mr Rayon's Avatar
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    Smile I know...I know another easy linear equation

    Solve this:

    9x+28 7x-6
    ------ = ------ -5
    5 2

    I am concerned about the "-5" and how it gets put into the working-out of the linear equations.
    Please show working-out. All help is appreciated!!!

    "7x-6," is supposed to be on the second numerator. And the "2" is meant for the second denominator. Soz guys.
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Mr Rayon View Post
    Solve this:

    9x+28 7x-6
    ------ = ------ -5
    5 2

    I am concerned about the "-5" and how it gets put into the working-out of the linear equations.
    Please show working-out. All help is appreciated!!!

    "7x-6," is supposed to be on the second numerator. And the "2" is meant for the second denominator. Soz guys.
    multiply through by 10 and see what happens
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  3. #3
    Member Mr Rayon's Avatar
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    Is this right so far?


    2(9x+28) 5(7x-6) 2
    --------- = -------- -
    10 10 10

    Ten as in each denominator.
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  4. #4
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Mr Rayon View Post
    Is this right so far?


    2(9x+28) 5(7x-6) 2
    --------- = -------- -
    10 10 10
    the point of multiplying through by 10 was to get rid of the fractions. you still have fractions here, i'm not sure what you did
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  5. #5
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Mr Rayon View Post
    Is this right so far?


    2(9x+28) 5(7x-6) 2
    --------- = -------- -
    10 10 10

    Ten as in each denominator.
    you're not getting what i'm saying...

    start with \frac {9x + 28}5 = \frac {7x - 6}2 - 5

    multiply through by 10, we get:

    2(9x + 28) = 5(7x - 6) - 50

    now continue
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  6. #6
    Member Mr Rayon's Avatar
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    2(9x+28)= 5(7x-6)-50
    18x+56=35x-30-50
    56+30+50=35x-18x
    136=17x
    8=x

    I get it now. Thanks
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