f(7)=5x-21

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Solution for f(7)=5x-21 equation: 


Simplifying
f(7) = 5x + -21

Reorder the terms for easier multiplication:
7f = 5x + -21

Reorder the terms:
7f = -21 + 5x

Solving
7f = -21 + 5x

Solving for variable 'f'.

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

Divide each side by '7'.
f = -3 + 0.7142857143x

Simplifying
f = -3 + 0.7142857143x

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