(-f-9)+(-f-9)=

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Solution for (-f-9)+(-f-9)= equation:


Simplifying
(-1f + -9) + (-1f + -9) = 0

Reorder the terms:
(-9 + -1f) + (-1f + -9) = 0

Remove parenthesis around (-9 + -1f)
-9 + -1f + (-1f + -9) = 0

Reorder the terms:
-9 + -1f + (-9 + -1f) = 0

Remove parenthesis around (-9 + -1f)
-9 + -1f + -9 + -1f = 0

Reorder the terms:
-9 + -9 + -1f + -1f = 0

Combine like terms: -9 + -9 = -18
-18 + -1f + -1f = 0

Combine like terms: -1f + -1f = -2f
-18 + -2f = 0

Solving
-18 + -2f = 0

Solving for variable 'f'.

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

Add '18' to each side of the equation.
-18 + 18 + -2f = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -2f = 0 + 18
-2f = 0 + 18

Combine like terms: 0 + 18 = 18
-2f = 18

Divide each side by '-2'.
f = -9

Simplifying
f = -9

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