Inequalities with two variables, the interval method, fractional rational equations, and quadratic inequalities. Essential Algebra Skills for Tests
Sites like Byju's list standard problems for practice, including equations like Core Topics by Grade Level Inequalities with two variables
For targeted answers to control works (контрольные работы), you can search for the authors of your specific didactic material: the interval method
Resources like YouTube provide video solutions for Control Work №3, Variant 1, and other specific variants. fractional rational equations