UniversityLesson 6/6 · Equations~10 min

Systems - Elimination

Elimination method

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Problem

2 x + y = 8, x - y = 1

2 x + y = 8, x - y = 1

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$(2 x + y) + (x - y) \neq = 3 x + 2 y$
The $+y$ and $-y$ terms cancel, so the sum is just $3x$.