Solve v= p/2(c+L) for L

- anonymous

Solve v= p/2(c+L) for L

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- sasogeek

do you have an idea what to do or have you tried something already?

- anonymous

Well, I got |dw:1379882997265:dw| but it's incorrect

- sasogeek

yeah, alright, let's fix this :)

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## More answers

- anonymous

ok :)

- sasogeek

Do you understand this?
|dw:1379883062090:dw|

- anonymous

Yes, so we get 2c+2L=p/v

- sasogeek

yes, next step

- sasogeek

Get it?
|dw:1379883307166:dw|

- anonymous

Yes.

- sasogeek

alright, next step

- sasogeek

Multiply both sides by 1/2, in other words, divide both sides by 2
|dw:1379883445598:dw|

- sasogeek

made a mistake, one sec

- sasogeek

|dw:1379883756318:dw|

- sasogeek

get it?

- anonymous

sure

- sasogeek

alright, what do you think is the result?

- anonymous

Okay, so we divied everything by 1/2

- sasogeek

we multiply* everything by 1/2

- anonymous

opps srry mistake. yes multiply

- sasogeek

don't confuse the two statements.
we multiply everything by 1/2, same as
we divide everything by 2
:)

- sasogeek

so what next?

- anonymous

well now I am confused. wherre did the 1/2 come out of?

- sasogeek

alright, here's what.
\(\huge 1-1=0 \)
do you agree?

- anonymous

yes

- sasogeek

alright, and do you know that, to move 1 to the other side of the equation, means to do this
\(\huge 1-1+1=0+1 \)
?

- anonymous

yes

- sasogeek

alright, then you know that, whatever you do to the left side of an equation, you do the same to the right... yeah?

- anonymous

ah okay so that's y you put the 1/2 in.

- sasogeek

exactly, we put the half in initially to cancel out out the 2 in 2L, but once we multiply the left side by 1/2, we have to multiply the right side by 1/2 as well

- sasogeek

do you understand now?

- anonymous

okay so i got L= (1/2) p/v- (1/2)-2c

- sasogeek

yup, can you simplify that?

- anonymous

i dont know how I would simplify the 1/2's

- sasogeek

alright, i'll help you out

- sasogeek

you'll have this, because the 2's will cancel out
|dw:1379884930249:dw|

- anonymous

Thats what I got. Oh so I was rtight :)

- sasogeek

you got the 2v up
that's what was wrong lol :P the 2v must be down if you do it how i showed you

- anonymous

okay thanks :)

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