f-4=9

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Solution for f-4=9 equation: 


Simplifying
f + -4 = 9

Reorder the terms:
-4 + f = 9

Solving
-4 + f = 9

Solving for variable 'f'.

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

Add '4' to each side of the equation.
-4 + 4 + f = 9 + 4

Combine like terms: -4 + 4 = 0
0 + f = 9 + 4
f = 9 + 4

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

Simplifying
f = 13

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