equations: 8x-12=84 ?  TOPIC_SOLVED

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equations: 8x-12=84 ?

Postby bethearlnuzzo on Fri Sep 30, 2011 1:04 am

equations: 8x-12=84 ?
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Re: equations: 8x-12=84 ?

Postby little_dragon on Fri Sep 30, 2011 1:42 pm

bethearlnuzzo wrote:equations: 8x-12=84 ?

U can see how 2 solve this here: http://www.purplemath.com/modules/solvelin.htm
start w/ adding 12
:wave:
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Re: equations: 8x-12=84 ?

Postby raj_patel on Sat Oct 01, 2011 9:06 pm

You just need to isolate x; remember to move the variables on one side and the numbers with no coefficients on the other.
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Re: equations: 8x-12=84 ?  TOPIC_SOLVED

Postby Randy702 on Wed Oct 19, 2011 3:10 am

HI there here are the steps to the solution:

8x -12 = 84 now we subtract -12 from both sides
8x -12 - (-12) = 84 - (-12)
adding -12 and 12 to get 0
8x + 0 = 84 + 12
8x = 96 divide both sides of the equation by 8
8x 96
8 = 8

The 8's cancell out leaving x = 96/8 dividing we get x = 12!
For some reason I was unable to "underline" can someone reply and tell me how to make these buttons work?
Randy Backus (University of Phoenix)
Thanks all.
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