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The LCD is finding the smallest denominator that makes them both the same.

Do you have any ideas of how to start doing that?

how do i find that?

not sure, sorry

Ok, the two denominators are|dw:1433440171339:dw|

I mean... |dw:1433440214478:dw|

ok

If we multiply the left one by 2, we get a common coefficient|dw:1433440278787:dw|

Do you see how that gives us a common coefficient of 6?

|dw:1433440359049:dw|

yes, because 2 times 3 is 6?

Right.

And we have 2 x's on the left, but only 1 on the right.

So we need to multiply the right side by x to make the number of x's the same

|dw:1433440468526:dw|

i see

:-) How do you think we can make the number of y's the same?

times it by y?

Close. That would give us:|dw:1433440631552:dw|

So the numbers of y's still aren't quite the same.

they arent?

ok whats next

It looks like we have 2 y's on the left, but 3 on the left.

i see

you mean 3 on the right?

Yeah, sorry.

ok

So, we need one more y on the left.

ok, so do we mulitply again?

|dw:1433440911998:dw|

Yep, great! So, are the denominators the same now?

yes

Great! So, in the full problem, how do we make that both denominators?

|dw:1433441111648:dw|

Like that?

oh, i forgot about that

ow do we do that?

how*

What do we need to multiply by the first denominator to get it to be our LCM?

*LCD

not sure, sorry.

|dw:1433441688086:dw|

what do i put in the (?)?

What did we multiply by to get the LCD of the left side?

by y?

Was that all?

i think so....

No, |dw:1433442752287:dw| so we need to multiply the left fraction on top and bottom by 2y^2

oh

|dw:1433442908806:dw|

Can you simplify?

how do i simplify??

Multiply

multiply the 5 by the 2y^2?

10y^2/6x^2y^3?

Yep, great! How about the other fraction?

|dw:1433443839427:dw| Like this??

so 8y2/12xy^5?

8y^2/12xy^5 @JoannaBlackwelder

is that all i need to do? @JoannaBlackwelder

please reply i have 20 mins to get this done :( @JoannaBlackwelder

ok

|dw:1433445935170:dw|

We need to multiply the right fraction by x to make common denominators.

i got that part

|dw:1433446083616:dw|

i see

|dw:1433446145225:dw|

So, now we can subtract the numerators, and the denominators stay the same.

So, what does that give us?

6y^2x?

No, I mean for the whole fraction.

im having a hard time subtracting the bottom

It stays the same. Doesn't subtract.

ohh i see

|dw:1433446648437:dw|

so,6y^2x/6x^2y^3

No, only like terms can add.

ok

so its 10y^2 - 4x/6x^2y^3 is that all??

Well, we can simplify a bit by factoring out a 2

what 2?

i do have to get this turned in now, if i don't i will get a 0

the 2 on 6 and 10??

Yes, and the 4

You can turn it in like that. You should get partial credit

ok, but if i were to do it some other time what can i do?

|dw:1433447702331:dw|

ok, thank you for all of your help, sorry that took so long.

And the twos cancel out. |dw:1433447840612:dw|

You're welcome :-)