Author note — to cover

Solve linear pairs where one or both equations must be multiplied first so a coefficient pair matches, e.g. 3x + 2y = 7 with 2x − y = 7; scale every term, negative coefficients and non-integer solutions included, then eliminate as on the sibling page. Both tiers. (A19)

• Fluency — direct questions on scaling before eliminating, limited to this lesson's stated scope (4 questions).
• Application — use the same skill in unfamiliar or contextual questions without introducing a later method (4 questions).
• Check — questions built around the exclusions and likely misconceptions named in the lesson brief (4 questions).