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Math Help - help with this substitution

  1. #1
    Senior Member
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    help with this substitution

    5a = 5 - b
    5a = 3 - b

    I got the solution set to be 1/2, 5/2

    i used substitution for substituting a into b of the second equation, just like they were x's and y's just used a's and b's there is no difference correct?

    a = 1- b/5 from top equation.

    then 5(1-b/5) = 3 - b

    ==5/2

    then for 1/2 I substituted the b= 5/2 back into one of the original equations.
    Does this look correct? Thanks alot.
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  2. #2
    MHF Contributor
    skeeter's Avatar
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    Re: help with this substitution

    5a = 5 - b
    5a = 3 - b
    this system of equations has no solution ... think about why.
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