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Math Help - Equations

  1. #1
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    Equations

    Hey guys,

    There are some questions that have been giving me some trouble.

    SOLVE:
    6x+5=7+2x

    Solve:
    3(2z-5)=30
    (i got z=7.5 for that one)

    Solve the equation

    1/2(x+3)-1/5(x-4)=5

    Your not allowed trail and emprovement in this one
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  2. #2
    Math Engineering Student
    Krizalid's Avatar
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    Quote Originally Posted by Xplicit View Post
    1/2(x+3)-1/5(x-4)=5
    I assume you mean \frac1{2(x+3)}-\frac1{5(x-4)}=5

    Multiply the whole equation by 10(x+3)(x-4)
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  3. #3
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Xplicit View Post
    Hey guys,

    There are some questions that have been giving me some trouble.

    SOLVE:
    6x+5=7+2x
    what did you get on this one? try to get all x's on one side and all constants on the other, then simplify

    Solve:
    3(2z-5)=30
    (i got z=7.5 for that one)
    correct

    Solve the equation

    1/2(x+3)-1/5(x-4)=5

    Your not allowed trail and emprovement in this one
    \frac 12 (x + 3) - \frac 15(x - 4) = 5 .........multiply through by 10, we get:

    5(x + 3) - 2(x - 4) = 5

    now expand and conitnue


    ...or did you mean to type: \frac 1{2(x + 3)} - \frac 1{5(x - 4)} = 5. if so, you should use the proper parentheses. let me know what the question is. in this case, multiply through by 10(x + 3)(x - 4)
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  4. #4
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    For the question 6x+5=7+2x I got X=0.25

    The other question was the first one you posted Where you times by 10 and i got X=6 for it. not to sure if thats right tho
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