For targeted answers to control works (контрольные работы), you can search for the authors of your specific didactic material:
To excel in these tests, focus on these fundamental procedures: the interval method
Sites like Byju's list standard problems for practice, including equations like Core Topics by Grade Level fractional rational equations
Inequalities with two variables, the interval method, fractional rational equations, and quadratic inequalities. Essential Algebra Skills for Tests properties of arithmetic operations
Rational numbers, properties of arithmetic operations, monomials and polynomials, and linear equations/inequalities.
Finding detailed solutions for algebra tests in didactic materials (GDZ) often requires identifying the specific textbook and grade level. How to Find Specific Solutions