f(x)=3x-lg(1+3x)

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Solution for f(x)=3x-lg(1+3x) equation: 


Simplifying
f(x) = 3x + -1lg(1 + 3x)

Multiply f * x
fx = 3x + -1lg(1 + 3x)
fx = 3x + (1 * -1gl + 3x * -1gl)
fx = 3x + (-1gl + -3glx)

Reorder the terms:
fx = -1gl + -3glx + 3x

Solving
fx = -1gl + -3glx + 3x

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -1glx-1 + -3gl + 3

Simplifying
f = -1glx-1 + -3gl + 3

Reorder the terms:
f = 3 + -3gl + -1glx-1

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