algebra 1

I was just wondering if anybody could explain to me the steps in 'solving systems in substitution' and 'solving systems in substitution with a variable'. I'm majorly confuzled!!!!

It might help to post a specific problem so someone can show you the steps.

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  1. -5x+y=-3. 3x-8y=24

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  2. -5x+y=-3
    +5x +5x
    ___________
    Y=5x-3

    3x-8(5x-3)=24
    3x-40x+24=24
    -37x+24=24
    -24-24
    ___________
    -37x=???

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