9(1+8f)=-20

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Solution for 9(1+8f)=-20 equation: 


Simplifying
9(1 + 8f) = -20
(1 * 9 + 8f * 9) = -20
(9 + 72f) = -20

Solving
9 + 72f = -20

Solving for variable 'f'.

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

Add '-9' to each side of the equation.
9 + -9 + 72f = -20 + -9

Combine like terms: 9 + -9 = 0
0 + 72f = -20 + -9
72f = -20 + -9

Combine like terms: -20 + -9 = -29
72f = -29

Divide each side by '72'.
f = -0.4027777778

Simplifying
f = -0.4027777778

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