Expresión 11: left parenthesis, "a" , "b" , right parenthesisa,b
11
Expresión 12: left parenthesis, "c" , "d" , right parenthesisc,d
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Expresión 13: "m" equals StartFraction, left parenthesis, "d" minus "b" , right parenthesis Over left parenthesis, "c" minus "a" , right parenthesis , EndFractionm=d−bc−a
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Expresión 14: "y" minus "d" equals "m" left parenthesis, "x" minus "c" , right parenthesisy−d=mx−c