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math help!!! its algebra. and i cant get the right answer!?

So the question is 4-2[3+4(x+1)]

and the answer according to the book is -8x-10

Could someone please tell me how to get that answer? I have not been able to!!! Thanks

11 Answers

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  • Anonymous
    1 decade ago
    Favorite Answer

    4-2[3+4(x+1)]=

    4-2[3+4x+4]=

    4-2[4x+7]=

    4-8x-14=

    -8x-10

    the book was correct :)

  • Anonymous
    1 decade ago

    Ok here is how I would do it.

    Start with the innermost grouping symbols, which in this case are ()

    Distribute the 4 in 4(x+1)

    So it would now be 4x + 4

    Then 3 + 4x + 4

    This is 7 + 4x. I just combined the like terms.

    Then distribute the 2 in 2[7+4x]

    This is 14 + 8x

    4 - 14 + 8x

    4 - 14 = -10

    -10 + 8x is the same as -8x -10......wait I think..... What answers have you been getting?

    Source(s): I am algebra for academic decathlon
  • Anonymous
    1 decade ago

    4-2[3+4(x+1)] follow the rules of BEDMAS

    4-2[3+4x+4]

    4-2[7+4x]

    4-14-8x

    =

    -8x-10

  • 1 decade ago

    1. you solve for the parenthesis in the parenthesis, multiplying 4 with every value in the parenthesis

    this leaves 4-2[3+4x+4]

    2. next, you need to multiply everything in the parenthesis by -2 (note, that the two is NEGATIVE and remember how to multiply negatives.)

    this leaves 4-6-8x-8

    3. finally combine like terms

    this leaves you with the final answer of -8x-10 OR -10-8x (its the same thing)

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  • Anonymous
    1 decade ago

    i would distribute the 4 to (x+1). it would give you 4-2[3+4x+4]. then combine the 3 and 4. and then distribute the 2 to the entire quantity. so it would be 4-14-8x . then you simplify to make it -8x-10

  • ?
    Lv 4
    1 decade ago

    4-2[3+4 (X+1)]

    expand the 1st bracket

    4-2[3+4X+4]

    sum like terms

    4-2[7+4X]

    expand the 2nd bracket

    4-14-8X

    = -10-8X

  • Peter
    Lv 6
    1 decade ago

    4-2[3+4(x+1)]

    4-2[3+4x+4]

    4-2[7+4x]

    4-14-8x

    =

    -8x-10

    The book was right and maybe u need to go slower next time..

  • 1 decade ago

    okay so you take

    4-2[3+4(x+1)] use distributive property to get

    4-2[3+4x+4] add inside the brackets to get

    4-2[4x+7] use the distributive property again to get

    4-8x-14 add like terms and you get the final answer:

    -8x-10!!

  • 1 decade ago

    first multiply what is in the () ------> 4x+4 then add 3------>4x+7 multiply that by 2 -----> 8x+14 then subtract that from 4 --------> -8x-10

  • engman
    Lv 4
    4 years ago

    I had a stressful time awareness your query till finally I remembered that m is usually the variable used for slope. So your equation flor slope is: m = (y2 - y1) / (x2 -x1) Plugging on your ordered pairs (x2, y2) and (x1, y1) you get: m = (3/5 + 4/5) / (a million/2 - a million/4) m = (7/5) / (a million/4) Invert the fraction on the backside to convey it to the coolest: m = (7/5)(4) m = 28/5

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