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Mathematics 10 Online
OpenStudy (jravenv):

Help me please screencap in comments. best answer rewarded

OpenStudy (jravenv):

OpenStudy (anonymous):

what is the least common multiply of 3, 4 and 6?

OpenStudy (jravenv):

12

OpenStudy (anonymous):

ok good, so at the moment (we might can reduce later) the common denominator will be \(12y\)

OpenStudy (jravenv):

Okay, whats next?

OpenStudy (anonymous):

you have to build up each fraction just like with numbers \[\frac{x+1}{3y}=\frac{4(x+1)}{4\times 3y}=\frac{4x+4}{12y}\] for the first one

OpenStudy (anonymous):

can you build up \[\frac{x-2}{4y}\]so the denominator will be \(12y\)?

OpenStudy (jravenv):

so times three

OpenStudy (anonymous):

yes, top and bottom, and don't forget the distributive law

OpenStudy (jravenv):

3x-6/12y

OpenStudy (anonymous):

right

OpenStudy (anonymous):

repeat with \[\frac{x+3}{6y}\]

OpenStudy (jravenv):

2x+6/12y

OpenStudy (anonymous):

ok good, now we are ready to add and subtract the denomiator will be \(12y\) and the numerator will be \[4x+4+3x-6-(2x+6)\] notice the last parentheses, you still have to distribute the minus sing, then combine like terms

OpenStudy (anonymous):

let me know when you get \(5x-8\)

OpenStudy (anonymous):

did you get it ?

OpenStudy (jravenv):

Yes I did.

OpenStudy (anonymous):

happy now?

OpenStudy (jravenv):

Yes, thank you, you make this stuff seem easy haha

OpenStudy (anonymous):

it is all easy when you know what you are doing when you do not, it is not since you were not born knowing this (i assume) you learn as you do it

OpenStudy (jravenv):

makes sense.

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