an=4-0.5

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Solution for an=4-0.5 equation: 


Simplifying
an = 4 + -0.5

Combine like terms: 4 + -0.5 = 3.5
an = 3.5

Solving
an = 3.5

Solving for variable 'a'.

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

Divide each side by 'n'.
a = 3.5n-1

Simplifying
a = 3.5n-1

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