f-40=391

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Solution for f-40=391 equation: 


Simplifying
f + -40 = 391

Reorder the terms:
-40 + f = 391

Solving
-40 + f = 391

Solving for variable 'f'.

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

Add '40' to each side of the equation.
-40 + 40 + f = 391 + 40

Combine like terms: -40 + 40 = 0
0 + f = 391 + 40
f = 391 + 40

Combine like terms: 391 + 40 = 431
f = 431

Simplifying
f = 431

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