Bex and Yin are running errands together. The system of equations above relates the number of errands Bex has to run, and y, the number of errands Yin has to run. Based on the system, which of the following statements is true?

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's.