f(2b)=3n^2+7n

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Solution for f(2b)=3n^2+7n equation: 


Simplifying
f(2b) = 3n2 + 7n

Remove parenthesis around (2b)
f * 2b = 3n2 + 7n

Reorder the terms for easier multiplication:
2f * b = 3n2 + 7n

Multiply f * b
2bf = 3n2 + 7n

Reorder the terms:
2bf = 7n + 3n2

Solving
2bf = 7n + 3n2

Solving for variable 'b'.

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

Divide each side by '2f'.
b = 3.5f-1n + 1.5f-1n2

Simplifying
b = 3.5f-1n + 1.5f-1n2

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