For students between the ages of 11 and 14. Collecting like terms Learn what like and unlike terms are and simplify algebraic expressions by collecting like terms with this BBC Bitesize Maths article.

in the expression \(3(m + 7)\), multiply both \(m\) and 7 by 3, so: \(3(m + 7) = 3 \times m + 3 \times 7 = 3m + 21\). Expanding brackets involves using the skills of simplifying algebra.