An=1.5+4.2(n-1)

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Solution for An=1.5+4.2(n-1) equation: 


Simplifying
An = 1.5 + 4.2(n + -1)

Reorder the terms:
nA = 1.5 + 4.2(-1 + n)
nA = 1.5 + (-1 * 4.2 + n * 4.2)
nA = 1.5 + (-4.2 + 4.2n)

Combine like terms: 1.5 + -4.2 = -2.7
nA = -2.7 + 4.2n

Solving
nA = -2.7 + 4.2n

Solving for variable 'n'.

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

Add '-4.2n' to each side of the equation.
-4.2n + nA = -2.7 + 4.2n + -4.2n

Combine like terms: 4.2n + -4.2n = 0.0
-4.2n + nA = -2.7 + 0.0
-4.2n + nA = -2.7

Reorder the terms:
2.7 + -4.2n + nA = -2.7 + 2.7

Combine like terms: -2.7 + 2.7 = 0.0
2.7 + -4.2n + nA = 0.0

The solution to this equation could not be determined.

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