f(x)=2x+a

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Solution for f(x)=2x+a equation: 


Simplifying
f(x) = 2x + a

Multiply f * x
fx = 2x + a

Reorder the terms:
fx = a + 2x

Solving
fx = a + 2x

Solving for variable 'f'.

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

Divide each side by 'x'.
f = ax-1 + 2

Simplifying
f = ax-1 + 2

Reorder the terms:
f = 2 + ax-1

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