Solve for n
n=\frac{a_{n}-1}{3}
Solve for a_n
a_{n}=3n+1
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3n+1=a_{n}
Swap sides so that all variable terms are on the left hand side.
3n=a_{n}-1
Subtract 1 from both sides.
\frac{3n}{3}=\frac{a_{n}-1}{3}
Divide both sides by 3.
n=\frac{a_{n}-1}{3}
Dividing by 3 undoes the multiplication by 3.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
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Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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