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f (  x ) = - 2 x + 4

- 2 x + 4 =  - 2

- 2 x = - 2 - 4

- 2 x = - 6

x = 3

- 2 x + 4 =  - 1

- 2 x = - 1 - 4

- 2 x = - 5

x = 5 /2

- 2 x + 4 =  2

- 2 x = 2 - 4

- 2 x = - 2

x =  1

- 2 x + 4 = 10

- 2 x = 10 - 4

- 2 x = 6

x = - 3

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