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Math Help - Solve for x.

  1. #1
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    Sep 2009
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    Solve for x.

    I just took a test and the only problem I had issues with was this:

    Solve for x. ax+b=5(x+a)

    Maybe its kinda early for my brain, but could someone please walk me through the steps of how I should've solved this?

    Thanks.
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  2. #2
    Banned
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    May 2009
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    ax+b=5(x+a) first let's expand the right side

    ax+b=5x+5a this is the distributive law, review it if you don't remember it as it is extremely important

    Now the name of the game is to isolate the x on one side of the equation

    So lets subtract 5a from both sides

    ax+b-5a=5x+5a-5a

    ax+b-5a=5x and let's subtract ax from both sides

    ax-ax+b-5a=5x-ax

    b-5a=5x-ax and we can factor the right side

    b-5a=x(5-a) and divide through to solve for x
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  3. #3
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    Sep 2009
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    Wow. It must be early. I knew that but I couldn't remember that for the life of me in class. So, I just guessed, and luckily I guessed that answer!

    Thank you so much.
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