Question

a=3n+1 for n

Answer 1

n= (a-1)/3

Answer 2

Step by step:

a = 3n + 1

Move the 1 to be with the a:

a - 1 = 3n + 1 - 1
a - 1 = 3n

Move the 3 over to be with the a:

\[\begin{align}
\frac{a-1}{3} &= \frac{\cancel{3}n}{\cancel{3}}\\
\frac{a-1}{3} &= n
\end{align}\]

Answer 3

that's better