document.write( "Question 669066: A line through the points (9,2) and (7,x) has a slope of 7/3. Find x.\r
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document.write( "I think this is how to start. (7-2/7-x)=7/3\r
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document.write( "(7/7-x)=7/3\r
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document.write( "7-x-=7
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document.write( "-7 -7
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document.write( "_________
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document.write( "-x=0
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document.write( "-- --
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document.write( "- 1 -1\r
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document.write( "x=o \n" );
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Algebra.Com's Answer #416047 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! A line through the points (9,2) and (7,x) has a slope of 7/3. Find x.\r \n" ); document.write( "\n" ); document.write( "I think this is how to start. (7-2/7-x)=7/3\r \n" ); document.write( "\n" ); document.write( "(7/7-x)=7/3\r \n" ); document.write( "\n" ); document.write( "7-x-=7 \n" ); document.write( "-7 -7 \n" ); document.write( "_________ \n" ); document.write( "-x=0 \n" ); document.write( "-- -- \n" ); document.write( "- 1 -1\r \n" ); document.write( "\n" ); document.write( "x=o \n" ); document.write( "================== \n" ); document.write( "A line through the points (9,2) and (7,x) has a slope of 7/3. Find x. \n" ); document.write( "--------- \n" ); document.write( "Not a well posed problem, it has x in the y position. \n" ); document.write( "If it said: \n" ); document.write( "\"A line through the points (9,2) and (7,y) has a slope of 7/3. Find y.\" it would make more sense. \n" ); document.write( "------------- \n" ); document.write( "Slope m = diffy/diffx = (2-y)/(9-7) = 7/3 \n" ); document.write( "(2-y)/(9-7) = 7/3 \n" ); document.write( "Cross multiply \n" ); document.write( "3(2-y) = 2*7 \n" ); document.write( "6-3y = 14 \n" ); document.write( "-3y = 8 \n" ); document.write( "y = -8/3 \n" ); document.write( " |