f(7a)=x-4

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Solution for f(7a)=x-4 equation: 


Simplifying
f(7a) = x + -4

Remove parenthesis around (7a)
f * 7a = x + -4

Reorder the terms for easier multiplication:
7f * a = x + -4

Multiply f * a
7af = x + -4

Reorder the terms:
7af = -4 + x

Solving
7af = -4 + x

Solving for variable 'a'.

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

Divide each side by '7f'.
a = -0.5714285714f-1 + 0.1428571429f-1x

Simplifying
a = -0.5714285714f-1 + 0.1428571429f-1x

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