high0ffkaaylaa27
high0ffkaaylaa27 high0ffkaaylaa27
  • 09-12-2019
  • Mathematics
contestada

Given f(x) = -3x + 21, find x when f(x) = 6.

Respuesta :

jimrgrant1 jimrgrant1
  • 09-12-2019

Answer:

x = 5

Step-by-step explanation:

Given

f(x) = - 3x + 21 and f(x) = 6, then equating gives

- 3x + 21 = 6 ( subtract 21 from both sides )

- 3x = - 15 ( divide both sides by - 3 )

x = 5

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