40-2f=4

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Solution for 40-2f=4 equation: 


Simplifying
40 + -2f = 4

Solving
40 + -2f = 4

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 + -2f = 4 + -40

Combine like terms: 40 + -40 = 0
0 + -2f = 4 + -40
-2f = 4 + -40

Combine like terms: 4 + -40 = -36
-2f = -36

Divide each side by '-2'.
f = 18

Simplifying
f = 18

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