Trending Simple Equations For Class 6 Icse : Extramarks provides icse class 6 physics syllabus, sample question papers, online study material for class 6 on each topic to score high in exams. (i) the sum of numbers x and 4 is 9. Simple Equations For Class 6 Icse - Simple equations are the general way of representing a relationship between a set of variables or the unknowns.