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15. if $f(x) = -3x + 8$, find $f(x) = -7$

Question

  1. if $f(x) = -3x + 8$, find $f(x) = -7$

Explanation:

Step1: Set function equal to -7

$-3x + 8 = -7$

Step2: Subtract 8 from both sides

$-3x + 8 - 8 = -7 - 8$
$-3x = -15$

Step3: Divide by -3 to solve for x

$\frac{-3x}{-3} = \frac{-15}{-3}$

Answer:

$x = 5$