You will need to be able to solve a system of two equations\r\n" );
document.write( "in two variables to do this problem. If you don't know how\r\n" );
document.write( "to do that post again asking how.\r\n" );
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document.write( "I will color-code the equations and their graphs:\r\n" );
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document.write( "We want to find the three vertices, the vertices A,B, and C\r\n" );
document.write( "of triangle ABC (points where two line intersect):\r\n" );
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document.write( "To find the vertex where the red and green lines intersect, \r\n" );
document.write( "solve this system:\r\n" );
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document.write( "Solve them by substitution and get (1,4)\r\n" );
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document.write( "To find the vertex where the red and blue lines intersect, \r\n" );
document.write( "solve this system:\r\n" );
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document.write( "Solve them by substitution and get (2,0)\r\n" );
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document.write( "To find the vertex where the red and green lines intersect \r\n" );
document.write( "by solving this system:\r\n" );
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document.write( "
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document.write( "Solve them by substitution and get (
,
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document.write( "
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document.write( "Edwin
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