a=-7+-1(n-1)

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Solution for a=-7+-1(n-1) equation: 


Simplifying
a = -7 + -1(n + -1)

Reorder the terms:
a = -7 + -1(-1 + n)
a = -7 + (-1 * -1 + n * -1)
a = -7 + (1 + -1n)

Combine like terms: -7 + 1 = -6
a = -6 + -1n

Solving
a = -6 + -1n

Solving for variable 'a'.

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

Simplifying
a = -6 + -1n

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