Question

select the correct answer.
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

Explanation:

Step1: Isolate the term with $n$

Subtract 1 from both sides:
$2n = 157 - 1$
$2n = 156$

Step2: Solve for $n$

Divide both sides by 2:
$n = \frac{156}{2}$
$n = 78$

Answer:

B. 78