Suppose a-b=0 which one of these expressions equals a+b ? choose one answer b.)2a c.)0 e.)a/b

 The correct option is (b) 2a.

Step-by-step explanation:  We are given the following condition :

We are to select the correct expression that equals (a + b).

From equation (i), we have

Therefore, we get

Thus, a + b = 2a.

Option (b) is CORRECT.

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.