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20 January, 20:04

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

A. - 2 = x

B. - 4 = x

C. 1 = x

D. 0 = x

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Answers (1)
  1. 20 January, 22:34
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    B. - 4 = x

    Step-by-step explanation:

    f (x) = 2x+7

    -1 = 2x+7

    solve for x

    subtract 7 from each side

    -1-7 = 2x + 7 - 7

    -8 = 2x

    divide by 2

    -8/2 = 2x/2

    -4 = x
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