The sum of two consecutive numbers is 157. This equation, where n is the first number, represents the situation:

2n + 1 = 157.

What is the first number?

A.
77
B.
78
C.
79
D.
80

Respuesta :

B. 78
To solve you subtract 1 form both sides and get 2n =156 then you dived both sides and get n = 78