document.write( "Question 803529: I think I solved this correctly, but just wanted to check:\r
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document.write( "9y+3x=18; -3y-x=-6\r
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document.write( "9y=18-3x
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document.write( "y=2-1/3x\r
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document.write( "Substitution for -3y-x=-6
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document.write( "-3(2-1/3x)-x=-6
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document.write( "-6-x-x=-6
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document.write( "-6-2x=-6
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document.write( "x=6\r
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document.write( "9y+3(6)=18
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document.write( "9y=0
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document.write( "y=0
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document.write( "We are supposed to solve for either variable and use the solution to determine the second variable. \r
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document.write( "I got x=6, y=0, but am unsure if this is correct. \n" );
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Algebra.Com's Answer #484397 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! 9y+3x=18 --> x + 3y = 6 \n" ); document.write( "-3y-x=-6 --> x + 3y = 6 \n" ); document.write( "--------------- \n" ); document.write( "It's the same eqn twice \n" ); document.write( "--> no unique solution, an infinite number of solutions. \n" ); document.write( " \n" ); document.write( " |