SOLUTION: Hi I need help with adding and subtracting with unlike denominators. I have a couple questions and would very much appreciate it if you would take some time to help me with them.

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Question 74341: Hi I need help with adding and subtracting with unlike denominators. I have a couple questions and would very much appreciate it if you would take some time to help me with them.
1. x-3/x+3 + x+9/x-3
2. x+8/3x-1 + x+3/x+1
3. 4/x+4 - 7/5x
4. 2x+1/3x-1 - x+4/x-2
5. 4x/5x-2 - 2x/5x+1
6. 2x/x-1 - 7x/x+4
If you could do these and explain them to me I would be very grateful!. Thank you.
Answer by checkley75(3666) (Show Source):
You can put this solution on YOUR website!
IF YOU MEAN (X-3)/(X+3)+(X+9)/(X-3) THEN
[(X-3)(X-3)+(X+9)(X+3)]/(X-3)(X+3)
(X^2-6X+9+X^2+12X+27)/(X^2-9)
(2X^2+6X+36)/(X^2-9)
2(X^2+3X+18)/(X^2-9)
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IF THIS IS CORRECT THEN YOU SHOULD BRACKET () THE REST OF THE PROBLEMS & RESUBMIT.