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Math Help - Need Help

  1. #1
    Newbie
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    Cool Need Help

    Hi,
    I am new to college and I am an oldie and never had the stuff I am learning now. I was wandering if someone can help me with this problem.
    I need to do this,

    solve: 2(x-1)-3 = -3x +2

    I most definately appreciate any help with this.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by old & new
    Hi,
    I am new to college and I am an oldie and never had the stuff I am learning now. I was wandering if someone can help me with this problem.
    I need to do this,

    solve: 2(x-1)-3 = -3x +2

    I most definately appreciate any help with this.
    Solve: 2(x-1)-3 = -3x +2

    First expand the bracketed term to give:

    2x - 2 - 3 = -3x + 2,

    which becomes:

    2x - 5 = -3x + 2.

    Now add 3x to both sides to give:

    2x + 3x - 5 = -3x + 3x +2,

    which becomes:

    5x - 5 = 2.

    Now add 5 to both sides:

    5x - 5 + 5 = 2 + 5,

    which is:

    5x = 7.

    Now divide both sides by 5 to give:

    (5x)/5 = 7/5,

    or:

    x = 7/5 = 1.4.

    Reality check: put x=1.4 in to the LHS of:

    2(x-1)-3 = -3x +2

    gives:

    2(0.4) - 3 = -2.2.

    Now put x=1.2 into the RHS gives:

    -3*1.4 + 2 = -2.2

    which checks out (note in this last expression I have used *
    as the multiply symbol to avoid confusion with the decimal point
    and x as a variable label).

    RonL
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  3. #3
    MHF Contributor
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    Quote Originally Posted by old & new
    solve: 2(x-1)-3 = -3x +2
    I think the only troubling thing is expanding 2(x-1). Remember that a(b+c)=ab+ac. The is the distributive law and one you'll need to be familiar with. Once you expand that out, the answer is just simple algebra.
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  4. #4
    Newbie
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    Nov 2005
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    Needing help again

    Can someone tell me if I did this right.

    Translate into a mathematical expression:

    the difference between ten and the quotient of a number and five.
    n/5-10

    is that right?

    Here is another one

    translate: the sum of fifteen and the product of twelve and x.

    15 + 12x ??????


    translate into an equation and slove.

    five less than the product of a number and two is seventeen.

    2x-5=17
    x=11

    Translate in an equation and solve:

    five more than the quotient of a number and three is eight..

    I need help with this one. I came up with x/3 + 5 = 8
    I need to sove it but have no idea what I am doing.

    I need help with them all

    Before I go, here is another...

    solve: 2x - 6(x-2) = 3(x-4)


    Thank You so much. I am not here looking for someone to give me the answers, I need help with how to do this stuff.


    Thanks
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