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#1 2006-05-20 12:52:18

Mathaphobe
Member
Registered: 2006-05-20
Posts: 18

Help!

I am useing a saxon:
Algebra 1
an incremental development
second edition textbook and need a little help with
problem set 90 pg 323 problem 14:

solve by elimination:
14.)  7x+2y+3
        3x-3y=9

i keep getting 27x=12 that cant be right..... mad

thanks in advance

Last edited by Mathaphobe (2006-05-20 13:27:19)


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#2 2006-05-20 13:37:18

liuv
Member
Registered: 2006-05-14
Posts: 29

Re: Help!

21x+6y=9
6x-6y=18

27x=27

x=1


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#3 2006-05-20 13:43:55

Mathaphobe
Member
Registered: 2006-05-20
Posts: 18

Re: Help!

Thanks i think i see what i did wrong i forgot to multipliy the 9 and the 3 after the = sign


Do you like my new avatar? (even if you don't i do smile)
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#4 2006-05-20 13:51:38

liuv
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Registered: 2006-05-14
Posts: 29

Re: Help!

smile


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#5 2006-05-21 03:47:40

Mathaphobe
Member
Registered: 2006-05-20
Posts: 18

Re: Help!

Little help with this one....

(2x-5x+4)divide by(x+2)
-thanks


Do you like my new avatar? (even if you don't i do smile)
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-An Incremental Development

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#6 2006-05-21 13:28:27

liuv
Member
Registered: 2006-05-14
Posts: 29

Re: Help!

Last edited by liuv (2006-05-21 13:31:26)


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#7 2006-05-22 23:38:06

krassi_holmz
Real Member
Registered: 2005-12-02
Posts: 1,908

Re: Help!

Ate answer depends on what do you want-do you need it factored or simplified (as liuv did) or what?


IPBLE:  Increasing Performance By Lowering Expectations.

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