Consistency with your X, Y, and Z axes prevents sign errors in your equations. Apply Governing Equations: Use for statics, or for dynamics.
To solve problems efficiently without relying solely on a solutions link, you must understand the core pillars of Ivanoff's text. Statics (Forces at Rest) engineering mechanics val ivanoff solutions link
Which of Val Ivanoff's textbook are you currently using? Consistency with your X, Y, and Z axes