f(x)=-7x+3(-9x+9)

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Solution for f(x)=-7x+3(-9x+9) equation: 


Simplifying
f(x) = -7x + 3(-9x + 9)

Multiply f * x
fx = -7x + 3(-9x + 9)

Reorder the terms:
fx = -7x + 3(9 + -9x)
fx = -7x + (9 * 3 + -9x * 3)
fx = -7x + (27 + -27x)

Reorder the terms:
fx = 27 + -7x + -27x

Combine like terms: -7x + -27x = -34x
fx = 27 + -34x

Solving
fx = 27 + -34x

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 27x-1 + -34

Simplifying
f = 27x-1 + -34

Reorder the terms:
f = -34 + 27x-1

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