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well, let me copy the first problem down here for us to work on |dw:1440351722236:dw|
first thing I can see do do straight away is to simplify the first fraction by cancelling out those 3's |dw:1440351817587:dw|
next step is to take a look at our denominators: x (x+4) and 7x the LCD of these is just x(x+4)(7x) so we want to multiply both sides by x(x+4)(7x)

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|dw:1440351894767:dw|
then we cancel out terms when we can |dw:1440351945962:dw|
k
im writing this down so i remember XD
|dw:1440351985342:dw|
then just solve?
yup, can you take it from here?
hold on
i got 0,3
gimme a sec
ok, so I agree that you get x = 0 and x = 3 when you solve; however, one of these is an extraneous solution notice what happens when you plug in x = 0 back into the equation
Yeah 0 is extraneous so its B
yup, great work
ready for the next one?
yep. Thank you for doing this btw
ok, so we have (7/8) - (1/x) = (3/4) let's start by subtracting (3/4) from each side
what would you subtract 3/4 from?
well, the left side is (7/8) - (1/x) and the right side is (3/4) so, let's start by subtracting (3/4) from the left side (7/8) - (1/x) - (3/4) = ?
i got 8?
yes, x = 8
so D?
yup
k hold on a sec
can you check one for me?
sure
k let me snip it
i got 8, or A
just a sec
lol i just got mentioned
yeah I agree, x = 8
|dw:1440357921426:dw|

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