SOLUTION: ok I want to see if I am doing this right? (8/21w) + (2/9w) 3w/(21w)(9w) + 2(21w)/(21w)(9w) 3w+42w/(21w)(9w) Now is this correct? Do I have to simplify it more? I got

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: ok I want to see if I am doing this right? (8/21w) + (2/9w) 3w/(21w)(9w) + 2(21w)/(21w)(9w) 3w+42w/(21w)(9w) Now is this correct? Do I have to simplify it more? I got       Log On


   

Question 134423: ok I want to see if I am doing this right?
(8/21w) + (2/9w)
3w/(21w)(9w) + 2(21w)/(21w)(9w)
3w+42w/(21w)(9w)
Now is this correct?
Do I have to simplify it more?
I got 2/3w
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
%288%29%2F%2821w%29+%2B+%282%29%2F%289w%29+ Start with the given expression


The LCM of 21w and 9w is 63w. So we need to get each denominator to 63w



%283%2F3%29%28%288%29%2F%2821w%29%29+%2B+%282%29%2F%289w%29+ Multiply the first fraction by 3%2F3


%2824%29%2F%2863w%29+%2B+%282%29%2F%289w%29+ Multiply


%2824%29%2F%2863w%29+%2B+%287%2F7%29%28%282%29%2F%289w%29%29+ Multiply the second fraction by 7%2F7


%2824%29%2F%2863w%29+%2B+%2814%29%2F%2863w%29+ Multiply


%2824%2B14%29%2F%2863w%29+ Combine the fractions


%2838%29%2F%2863w%29+ Add



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Answer:


So %288%29%2F%2821w%29+%2B+%282%29%2F%289w%29+ simplifies to %2838%29%2F%2863w%29+


In other words, %288%29%2F%2821w%29+%2B+%282%29%2F%289w%29=%2838%29%2F%2863w%29+