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Anonymous
Anonymous asked in Education & ReferenceHomework Help · 1 decade ago

HELP. MATH HELP! HOMEWORK HELP :/?

i finished my homework,

but i got stuck on two problems :/

help please?

its two problems thats it .

1. -14x-23-15x=151

2. 24x+ 81 + 7x=19

these give me headaches gahhh help?

ohhh ++ on this question i did the right process

but when i checked it i got the wrong answer?

46x -13-51x= -64

Update:

on the bottom one the third question i ment to put,

48x-13-51x=-64

Update 2:

on the bottom one the third question i ment to put,

48x-13-51x=-64

Update 3:

on the bottom one the third question i ment to put,

48x-13-51x=-64

9 Answers

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  • ?
    Lv 7
    1 decade ago
    Favorite Answer

    I'll show you how to do one .. the rest will be similar.

    -14x-23-15x=151

    First, rewrite it to be easier to work with

    -14x + (-23) + (-15x) = 151

    Now, combine like items

    -14x + (-15x)

    -29x + (-23) = 151

    Now, isolate the variable. Remember, what you do to ONE side of the equal sign do to the other

    -29x + (-23) - (-23) = 151 - (-21)

    -29x = 151 + 21

    -29x = 172

    Now, divide both sides by -29 for your answer

    You're ready to do the rest on your own!

  • 1 decade ago

    1. -14x-23-15x=151

    -->rewrite

    -14x + -23 + -15x = 151

    -->combine like terms

    -29x + -23 = 151

    -->add 23 to both sides

    -29x + -23 + 23 = 151 + 23

    -29x = 174

    -->divide both sides by -29

    -29x/-29 = 174/-29

    x = -6

    2. 24x + 81 + 7x = 19

    -->combine like terms

    31x + 81 = 19

    -->add -81 to both sides

    31x + 81 + -81 = 19 + -81

    31x = 62

    -->divide both sides by 31

    31x/31 = 62/31

    x = 2

    48x - 13 - 51x = -64

    48x + -13 + -51x = -64

    -3x + -13 = -64

    -3x + -13 + 13 = -64 + 13

    -3x = -51

    -3x/-3 = -51/-3

    x = 17

  • 1 decade ago

    -14x - 23 - 15x = 151

    -29x - 23 = 151

    + 23 +23

    -29x = 174

    x= -6

    24x + 81 + 7x = 19

    31x + 81 = 19

    - 81 -81

    31x = -62

    x = -2

    48x - 13 -51x = -64

    -3x - 13 = -64

    +13 + 13

    -3x = -51

    x = 17

  • 1 decade ago

    1. -14x-23-15x=151 -29x-23=151 next, add 23 to both sides, -29x=174, then divide 174 by 29 to get the answer.

    2. 24x +81 +7x=19 First, add the x together. 31x+81=19 Then subtract 81 from 19 to get a negative number. 31x=-62. Last, divide -62 by 31 to get your answer!! Good Luck! :)

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  • 1 decade ago

    lets do the steps for you

    u have your unknown (x)

    the first thing you wanna do is group em

    therefore -14-15 becomes -29x

    then put 23 on the other side by adding it to 151

    this becomes 174

    divide this by -29 and you get -6

    to check it we do (-29 * -6) - 23 = ??

    = 151

    both sides are the same therefore its correct

    ------------------------------------------------------------------------

    followin the same steps.. theres 31x = -62 (because 19 - 81)

    divide both sides.. and you get x = -2

    to check: 31(-2) = -62

    = -62

    both sides are the same

    --------------------------------------------------------------------

    48 - 51 = -3

    -64 + 13 = -51

    divide both sides by -3 and you get x=17

    to check -3(17) -13 = -64

    = -64

    both sides are the same (y)

    --------------------------------------------------------------------

    hopefully that helps.. you probably didnt collect like terms correctly.. look out for that next time :P

  • Anonymous
    1 decade ago

    1) x= -6

    2) x= -2

    3) x= 17

  • 1 decade ago

    1. -29x=174

    x=-6

    2. 31x=-62

    x=-.5

    3. -3x=-51

    x=17

  • 1 decade ago

    1. x=-6

    2.x=-2

  • 1 decade ago

    1. -14x-23-15x=151

    -29x-23=151

    -29x=23+151

    -29x=174

    -(29x)/(-29)=(174)/(-29)

    x=(174)/(-29)

    x=-6

    2. 24x+81+7x=19

    31x+81=19

    31x=-81+19

    31x=-62

    (31x)/(31)=-(62)/(31)

    x=-(62)/(31)

    x=-2

    Source(s): me
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