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12 cards from this deck
Pairs of equations with two unknown variables
Find values making both equations true simultaneously
Algebraic (elimination/substitution) & graphical
Multiply to make coefficients of one unknown same
Add/subtract equations to eliminate one unknown
Substitute found value to find other unknown
Check answer in original equations
Draw both equation graphs on same coordinate grid
Point of intersection of the lines
Add equations together to eliminate
Reduces chance of arithmetic errors
Algebraic method
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