Expressions and equations

What the teaching sequence covers here

Simplify expressions by collecting like terms, factorising out common factors and expanding a single term over a bracket; form and solve linear equations with rational coefficients and simple inequalities, knowing multiplying or dividing by a negative reverses an inequality; substitute values into formulae; and rearrange formulae, such as solving the rectangle perimeter formula for width.

This is ChalkBee's own paraphrase of the official teaching sequence, not the Ministry's wording. Tahurangi curriculum content is Crown copyright, Ministry of Education, licensed CC BY-NC 4.0, so we describe it in our own words and cite the source: NZC Mathematics and Statistics Phase 4 (Years 9-10). Always check the official page for the exact requirement.