Answer :
To solve for the first number in the equation [tex]\(2n + 1 = 157\)[/tex], follow these steps:
1. Subtract 1 from both sides of the equation to isolate the term involving [tex]\(n\)[/tex]:
[tex]\[
2n = 157 - 1
\][/tex]
2. Simplify the right side of the equation:
[tex]\[
2n = 156
\][/tex]
3. Divide both sides by 2 to solve for [tex]\(n\)[/tex]:
[tex]\[
n = \frac{156}{2}
\][/tex]
4. Calculate the result:
[tex]\[
n = 78
\][/tex]
Therefore, the first number is [tex]\( \boxed{78} \)[/tex].
1. Subtract 1 from both sides of the equation to isolate the term involving [tex]\(n\)[/tex]:
[tex]\[
2n = 157 - 1
\][/tex]
2. Simplify the right side of the equation:
[tex]\[
2n = 156
\][/tex]
3. Divide both sides by 2 to solve for [tex]\(n\)[/tex]:
[tex]\[
n = \frac{156}{2}
\][/tex]
4. Calculate the result:
[tex]\[
n = 78
\][/tex]
Therefore, the first number is [tex]\( \boxed{78} \)[/tex].