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Solve v= p/2(c+L) for L
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sasogeek
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do you have an idea what to do or have you tried something already?
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Well, I got |dw:1379882997265:dw| but it's incorrect
sasogeek
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yeah, alright, let's fix this :)
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ok :)
sasogeek
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Do you understand this?
|dw:1379883062090:dw|
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Yes, so we get 2c+2L=p/v
sasogeek
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yes, next step
sasogeek
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Get it?
|dw:1379883307166:dw|
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Yes.
sasogeek
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alright, next step
sasogeek
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Multiply both sides by 1/2, in other words, divide both sides by 2
|dw:1379883445598:dw|
sasogeek
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made a mistake, one sec
sasogeek
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|dw:1379883756318:dw|
sasogeek
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get it?
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sure
sasogeek
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alright, what do you think is the result?
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Okay, so we divied everything by 1/2
sasogeek
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we multiply* everything by 1/2
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opps srry mistake. yes multiply
sasogeek
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don't confuse the two statements.
we multiply everything by 1/2, same as
we divide everything by 2
:)
sasogeek
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so what next?
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well now I am confused. wherre did the 1/2 come out of?
sasogeek
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alright, here's what.
\(\huge 1-1=0 \)
do you agree?
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yes
sasogeek
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alright, and do you know that, to move 1 to the other side of the equation, means to do this
\(\huge 1-1+1=0+1 \)
?
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yes
sasogeek
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alright, then you know that, whatever you do to the left side of an equation, you do the same to the right... yeah?
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ah okay so that's y you put the 1/2 in.
sasogeek
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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
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do you understand now?
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okay so i got L= (1/2) p/v- (1/2)-2c
sasogeek
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yup, can you simplify that?
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i dont know how I would simplify the 1/2's
sasogeek
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alright, i'll help you out
sasogeek
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you'll have this, because the 2's will cancel out
|dw:1379884930249:dw|
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Thats what I got. Oh so I was rtight :)
sasogeek
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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
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okay thanks :)