Question

What is the sum of rational expressions

Answer 1

Since you have a common denominator, just add the numerators and set the sum over the common denominator.

`(15)/(7x) + (12)/(7x) = (15 + 12)/(7x) = (27)/(7x)`

There is no common factor of 27 and 7x, so the fraction cannot be reduced.

Answer: C.
`(27)/(7x)`