Question

1. Which of the following can be added without altering any of the fractions?

4x/x-2 + 7/x-2
2x/x+2 + 2x/x-2
3x+4/2x-5 + 1/3x+4
2x/x-8 + x-8/2x

Answer 1

Below

Explanation:

The first one can be added because the two addends have the same denominator ...

4x/(x-2) + 7 / ( x-2) = (4x+7) / (x-2 )

The others will need to have a common denominator calculated to add them....