document.write( "Question 178920: Slove the syste, by elinibation:\r
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document.write( "12x + 16y = -19
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document.write( "14x - 10y = 71\r
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document.write( "I know the anaqer is (11/4, -13/4) but
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document.write( "I hace to shiw how to get that.\r
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document.write( "thx 4 your help. \n" );
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Algebra.Com's Answer #133866 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Slove the syste, by elinibation: \n" ); document.write( "12x + 16y = -19 \n" ); document.write( "14x - 10y = 71 \n" ); document.write( "-------------- \n" ); document.write( "To solve by elimination, multiply one or both of the eqns to get the same coefficient for one of the variables. \n" ); document.write( "Multiply the 1st by 5, and the 2nd by 8. \n" ); document.write( "60x + 80y = -95 \n" ); document.write( "112x- 80y = 568 Now add them \n" ); document.write( "--------------- \n" ); document.write( "172x = 473 \n" ); document.write( "x = 11/4 \n" ); document.write( "------------ \n" ); document.write( "Then sub for x into either eqn to find y \n" ); document.write( "12*(11/4) + 16y = -19 \n" ); document.write( "33 + 16y = -19 \n" ); document.write( "16y = -52 \n" ); document.write( "y = -13/4 \n" ); document.write( " \n" ); document.write( " |