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Math Help - Simple algebra problem.

  1. #1
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    Simple algebra problem.

    Hi there,

    how do i solve for z? can someone help to show me step by step in how to solve for z?

    100 = ( (7/ (1 + z)^1) + (107/ (1 + z)^2) )
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  2. #2
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    Re: Simple algebra problem.

    Multiply each term (both sides) by (1+z)^2 You should get a quadratic equation (which in this case factorizes)
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  3. #3
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    Re: Simple algebra problem.

    could you show me how to?
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  4. #4
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    Re: Simple algebra problem.

    Let A and B be the 2 terms on the right hand side
    So 100 = A+B Multiplying each term by (i+z)^2 we get 100(1+z)^2= A(1+z)^2 + B(1+z)^2

    Now put back into this line what A and B stood for and you will see that some cancelling can be done.
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