Question

question given f(x) = -3x + 3, solve for x when f(x) = 9. answer attempt 1 out of 2

Explanation:

Step1: Substitute \( f(x) = 9 \) into the function

We know \( f(x)=-3x + 3 \), so when \( f(x) = 9 \), we have the equation \( 9=-3x + 3 \).

Step2: Subtract 3 from both sides

Subtract 3 from each side of the equation: \( 9 - 3=-3x+3 - 3 \), which simplifies to \( 6=-3x \).

Step3: Divide both sides by -3

Divide both sides of the equation \( 6 = - 3x \) by -3: \( \frac{6}{-3}=\frac{-3x}{-3} \), which gives \( x=-2 \).

Answer:

\( x = - 2 \)