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Thread: Solving an inequality

  1. Feb 26th 2013, 12:30 AM #1
    Simimano
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    Exclamation Solving an inequality

    Hi there. I was just wondering if anyone could perhaps just set me straight with this minor inequality question..

    Inequality: 2x-3 ≦ 4+x
    I said: 2x-x ≦ 4+3
    2x ≦ 7 Solution: x ≦ 7

    Now knowing the answer from an extra revision paper, The paper did not show that there is 2x left after I did 2x-x, Now I'd like to know does the 2 fall away in that case or..? Maybe I'm just not thinking straight right now from all the maths But could anyone please just explain it to me..

    Thanks!!
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  2. Feb 26th 2013, 03:18 AM #2
    HallsofIvy
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    Re: Solving an inequality

    If you have 2 apples and give away one apple, you have 1 apple left. 2 of anything minus one of the things leaves 1 thing.

    2x- x= (2- 1)x= x.
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