While there may be no fixed time you should dedicate to practice equations, the time required to practice the same can vary from individual to individual, as some find mathematics challenging and complicated. In contrast, others can gain a firm command over the subject; picking and choosing complex sums and equations from your NCERT Answer Guide for Class 11 Maths books is advisable. Dedicating a few hours every week to practice those complex equations also becomes essential. This will help you prepare most effectively, thus keeping you well-prepared for the examinations you must appear for.