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8 October, 15:20

Find x if f (x) = 2x + 7 and f (x) = - 1.

5

-3

-4

+4
Answers (2)
  1. 8 October, 16:51
    0
    F (x) is - 1 which means x is - 1 so you times 2 x - 1 and that is - 2 then you add - 2+7 which is 5. so your answer would be 5
  2. 8 October, 17:36
    0
    x = - 4

    Step-by-step explanation:

    Start by replacing f (x) with - 1.

    -1 = 2x + 7

    Then subtract 7 on both sides of the equation and add like terms.

    -8 = 2x

    Then divide 2 on both sides of the equation and solve.

    -4 = x
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