Expression 29: "m" Subscript, 1 , Baseline left parenthesis, "x" minus "C" Subscript, 1 , Baseline , right parenthesis equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "E" Subscript, 1 , Baseline , right parenthesism1x−C1=m2x−E1
Expression 33: "y" equals "m" Subscript, 1 , Baseline left parenthesis, "x" minus "G" Subscript, 1 , Baseline , right parenthesisy=m1x−G1
33
Expression 34: "y" equals "m" Subscript, 3 , Baseline left parenthesis, "x" minus "B" Subscript, 1 , Baseline , right parenthesis plus "B" Subscript, 2 , Baseliney=m3x−B1+B2
34
Expression 35: "m" Subscript, 1 , Baseline left parenthesis, "x" minus "G" Subscript, 1 , Baseline , right parenthesis equals "m" Subscript, 3 , Baseline left parenthesis, "x" minus "B" Subscript, 1 , Baseline , right parenthesis plus "B" Subscript, 2 , Baselinem1x−G1=m3x−B1+B2