Question

Given f(x) = -3x + 5, solve for x when f(x) =
- 4.

Answer 1

3 =x

Explanation:

f(x) = -3x + 5

Let f(x) = -4

-4 = -3x+5

Subtract 5 from each side

-4-5 = -3x+5-5

-9 = -3x

Divide each side by -3

-9/-3 = -3x/-3

3 =x

Answer 2

x = 3

Explanation:

Step 1: Define

f(x) = -3x + 5

f(x) = -4

Step 2: Substitute and Evaluate

-4 = -3x + 5

-9 = -3x

x = 3