7f-9f=20

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Solution for 7f-9f=20 equation: 


Simplifying
7f + -9f = 20

Combine like terms: 7f + -9f = -2f
-2f = 20

Solving
-2f = 20

Solving for variable 'f'.

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

Divide each side by '-2'.
f = -10

Simplifying
f = -10

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