document.write( "Question 213838: Please help me solve this equation: Three times a first number decreased by a second number is 1. The first number increased by twice the second number is 12. Find the numbers\r
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document.write( "I tried: Let x equal 1st number
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document.write( " Let y equal 2nd number
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document.write( " 3x-y=1
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document.write( " 3x+2y=12
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Algebra.Com's Answer #161533 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! 3x-y=1 multiply by 2 & add. \n" ); document.write( "x+2y=12 \n" ); document.write( "6x-2y=2 \n" ); document.write( "------------------ \n" ); document.write( "7x=14 \n" ); document.write( "x=14/7 \n" ); document.write( "x=2 ans. \n" ); document.write( "2+2y=12 \n" ); document.write( "2y=12-2 \n" ); document.write( "2y=10 \n" ); document.write( "y=10/2 \n" ); document.write( "y=5 ans. \n" ); document.write( "Proof: \n" ); document.write( "3*2-5=1 \n" ); document.write( "6-5=1 \n" ); document.write( "1=1 \n" ); document.write( " |