a(n)=-9+(n-1)+6

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Solution for a(n)=-9+(n-1)+6 equation: 


Simplifying
a(n) = -9 + (n + -1) + 6

Multiply a * n
an = -9 + (n + -1) + 6

Reorder the terms:
an = -9 + (-1 + n) + 6

Remove parenthesis around (-1 + n)
an = -9 + -1 + n + 6

Reorder the terms:
an = -9 + -1 + 6 + n

Combine like terms: -9 + -1 = -10
an = -10 + 6 + n

Combine like terms: -10 + 6 = -4
an = -4 + n

Solving
an = -4 + 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 = -4n-1 + 1

Simplifying
a = -4n-1 + 1

Reorder the terms:
a = 1 + -4n-1

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