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10 cards from this deck
Relationship between pairs (x,y)(x,y)(x,y) satisfying it
One unique pair (x,y)(x,y)(x,y) satisfying both equations
Express 1 var in terms of other, sub into 2nd eq
Add/subtract equations to eliminate one variable
Rearrange 1 eq to make 1 variable the subject
Solve resulting equation for remaining variable
Unique solution (intersect at 1 point)
No solutions (parallel lines)
Infinitely many solutions (same line)
Carefully define your variables
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