f(x)=-[x-3]

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Solution for f(x)=-[x-3] equation: 


Simplifying
f(x) = -1[x + -3]

Multiply f * x
fx = -1[x + -3]

Reorder the terms:
fx = -1[-3 + x]
fx = [-3 * -1 + x * -1]
fx = [3 + -1x]

Solving
fx = 3 + -1x

Solving for variable 'f'.

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

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

Simplifying
f = 3x-1 + -1

Reorder the terms:
f = -1 + 3x-1

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