2(f-9)=-10

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Solution for 2(f-9)=-10 equation: 


Simplifying
2(f + -9) = -10

Reorder the terms:
2(-9 + f) = -10
(-9 * 2 + f * 2) = -10
(-18 + 2f) = -10

Solving
-18 + 2f = -10

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 = -10 + 18

Combine like terms: -18 + 18 = 0
0 + 2f = -10 + 18
2f = -10 + 18

Combine like terms: -10 + 18 = 8
2f = 8

Divide each side by '2'.
f = 4

Simplifying
f = 4

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