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8 cards from this deck
Rearrange one equation to isolate a variable, then substitute into the other equation
Rearrange one equation to make a variable the subject
Substitute the expression into the other equation
Solve the resulting equation
Substitute back to find the other variable
The line is a tangent to the curve
A line that just touches a curve without cutting it
Use calculator's quadratic solver (if working not required)
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