To work this question out, you must get all of the x's on one side of the equation, and the other numbers, without an x on the other. One way to do this is to subtract 1x from each side. This would then give you the equation:
4x + 9 = -28
Then you can subtract 9 from both sides giving you:
4x = -37
To find what x equals, you would then divide both sides of the equation by 4 to get x alone, giving you:
x = - 37 / 4
x = -9.25
Please let me know if you have any other questions. Thank you for your question. I hope I helped!