Respuesta :

Answer:

x = -3

Step-by-step explanation:

First, we want to sub in the numbers then isolate the variable. We subtract 4 from both sides. That gives us 13 - 4 = -3x which equals 9 = -3x. Now we divide both sides by -3. So x equals -3. I hope this helps! Please make me the brainliest! Thanks!