Question
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
2n + 1 = 157.
What is the first number?
A.
77
B.
78
C.
79
D.
80
Answers
GPT-4o mini
To find the first number \( n \), we can solve the equation provided:
\[
2n + 1 = 157.
\]
First, we will subtract 1 from both sides of the equation:
\[
2n = 157 - 1,
\]
\[
2n = 156.
\]
Next, we divide both sides by 2:
\[
n = \frac{156}{2},
\]
\[
n = 78.
\]
Thus, the first number is \( 78 \).
The answer is:
**B. 78**
\[
2n + 1 = 157.
\]
First, we will subtract 1 from both sides of the equation:
\[
2n = 157 - 1,
\]
\[
2n = 156.
\]
Next, we divide both sides by 2:
\[
n = \frac{156}{2},
\]
\[
n = 78.
\]
Thus, the first number is \( 78 \).
The answer is:
**B. 78**