f(4)=4-13

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Solution for f(4)=4-13 equation: 


Simplifying
f(4) = 4 + -13

Reorder the terms for easier multiplication:
4f = 4 + -13

Combine like terms: 4 + -13 = -9
4f = -9

Solving
4f = -9

Solving for variable 'f'.

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

Divide each side by '4'.
f = -2.25

Simplifying
f = -2.25

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