A=4+20*(n-1)+8

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Solution for A=4+20*(n-1)+8 equation: 


Simplifying
A = 4 + 20(n + -1) + 8

Reorder the terms:
A = 4 + 20(-1 + n) + 8
A = 4 + (-1 * 20 + n * 20) + 8
A = 4 + (-20 + 20n) + 8

Reorder the terms:
A = 4 + -20 + 8 + 20n

Combine like terms: 4 + -20 = -16
A = -16 + 8 + 20n

Combine like terms: -16 + 8 = -8
A = -8 + 20n

Solving
A = -8 + 20n

Solving for variable 'A'.

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

Simplifying
A = -8 + 20n

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