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

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


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

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

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

Combine like terms: 1 + 2 = 3
an = 3 + -2n

Solving
an = 3 + -2n

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 + -2

Simplifying
a = 3n-1 + -2

Reorder the terms:
a = -2 + 3n-1

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