Respuesta :

Esther

Answer:

x = 5

Step-by-step explanation:

Given: f(x) = -3x + 19

  • f(x) = 4

1. Substitute f(x) = 4 into f(x) = -3x + 19:

⟹ 4 = -3x + 19

2. Add 3x to both sides:

4 + 3x = -3x + 3x + 19

⟹ 3x + 4 = 19

3. Subtract 4 from both sides:

3x + 4 - 4 = 19 - 4

⟹ 3x = 15

4. Divide both sides by 3:

3x ÷ 3 = 15 ÷ 3

⟹ x = 5

5. Check your work:

4 = -3x + 19

4 = -3(5) + 19

4 = -15 + 19

⟹ 4 = 4 ✔

Learn more here:

brainly.com/question/24278473

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