f(x)=7x+21

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Solution for f(x)=7x+21 equation: 


Simplifying
f(x) = 7x + 21

Multiply f * x
fx = 7x + 21

Reorder the terms:
fx = 21 + 7x

Solving
fx = 21 + 7x

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 + 7

Simplifying
f = 21x-1 + 7

Reorder the terms:
f = 7 + 21x-1

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