1. The problem is to break down a mathematical expression or concept suitable for a class six student. 2. Since the user did not specify a particular problem, let's explain a simple algebraic expression: simplifying $2x + 3x$. 3. The formula used here is the addition of like terms: $ax + bx = (a+b)x$. 4. Important rule: Only terms with the same variable and exponent can be added or subtracted. 5. Applying the rule: $2x + 3x = (2+3)x$. 6. Simplify the sum inside the parentheses: $(2+3) = 5$. 7. So, $2x + 3x = 5x$. 8. This means if you have 2 of something and 3 of the same thing, altogether you have 5 of that thing. 9. This is how we simplify expressions by combining like terms. 10. Final answer: $5x$.