You could if was equal to . Go back and reread what I wrote in post 10. When you try to get a common denominator, what you do to the bottom of each fraction you also need to do to the top!
Well i don't know why you give up or why you don't understand it.
Just follow these rules.
a)To add 2 or more fractions they must have the same denominator.
b)If you multiply with the same non-zero number the numerator and the denominator the value of the fraction remains the same.
Simple as that.
So does not have the same denominator.
So we should just make it have(in order rule a) to be true).
How? With the help of rule b).
So we multiply with t both the numerator and denominator.
And also we multiply with t-6 both the numerator and denominator.
After we do this, we add the numerators to get the new single numerator of our new fractions and the final single fraction has the same denominator.