a(n)=2+(n-1)-4

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Solution for a(n)=2+(n-1)-4 equation: 


Simplifying
a(n) = 2 + (n + -1) + -4

Multiply a * n
an = 2 + (n + -1) + -4

Reorder the terms:
an = 2 + (-1 + n) + -4

Remove parenthesis around (-1 + n)
an = 2 + -1 + n + -4

Reorder the terms:
an = 2 + -1 + -4 + n

Combine like terms: 2 + -1 = 1
an = 1 + -4 + n

Combine like terms: 1 + -4 = -3
an = -3 + n

Solving
an = -3 + n

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Divide each side by 'n'.
a = -3n-1 + 1

Simplifying
a = -3n-1 + 1

Reorder the terms:
a = 1 + -3n-1

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