What would you do if you didn’t know what the values of the denominators were, such as when there are variables in the denominators?

please help !

Question

What would you do if you didn’t know what the values of the denominators were, such as when there are variables in the denominators? 

please help !

anonymous · Answer

If you are adding or subtracting fractions with unlike denominators that have variables in them, you still need to establish a common denominator to perform the operation.

anonymous · Answer

For example.

|dw:1414385308216:dw|

anonymous · Answer

Is this at all what you are asking?

anonymous · Answer

yeah that's all I need to know. So basically you just find the common denominator ?