Rinku sir is good with science and maths for IB. My daughter is in MYP4. She has improved on the basics and numericals.
Top Concept Videos in Mathematics Linear Equations in Two Variables
Solving Linear Equations Step-by-Step
CBSE - Class 9>Mathematics>Linear Equations in Two Variables
Getting Started with Linear Equations
CBSE - Class 9>Mathematics>Linear Equations in Two Variables
Drawing the Graph of a Linear Equation
CBSE - Class 9>Mathematics>Linear Equations in Two Variables