f(x)=5x-3(3x+7)

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Solution for f(x)=5x-3(3x+7) equation: 


Simplifying
f(x) = 5x + -3(3x + 7)

Multiply f * x
fx = 5x + -3(3x + 7)

Reorder the terms:
fx = 5x + -3(7 + 3x)
fx = 5x + (7 * -3 + 3x * -3)
fx = 5x + (-21 + -9x)

Reorder the terms:
fx = -21 + 5x + -9x

Combine like terms: 5x + -9x = -4x
fx = -21 + -4x

Solving
fx = -21 + -4x

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -21x-1 + -4

Simplifying
f = -21x-1 + -4

Reorder the terms:
f = -4 + -21x-1

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