document.write( "Question 134119: the quadrilateral with vertices P(6,3), Q(2,-2), R(1,7) and S(x,y) is a parallelogram. Find (x,y) algebraically. \n" ); document.write( "
Algebra.Com's Answer #98084 by solver91311(24713)\"\" \"About 
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Calculate the slope of the line passing through P and Q. Use the point-slope form of the equation of a line to derive an equation of a line parallel to the line through P and Q passing through R. Hint: Parallel lines have equal slopes.\r
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\n" ); document.write( "\n" ); document.write( "Repeat the process using the slope of the line through PR to derive an equation of the line parallel to PR passing through Q.\r
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\n" ); document.write( "\n" ); document.write( "Solve the system of equations consisting of your two derived equations. The solution set will be the ordered pair defining S.
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