document.write( "Question 431128: I'm trying to help my stepson do his math. Writing Equations from Word Problems. I don't know how to do this.\r
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document.write( "The problem is:\r
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document.write( "7 less than triple a number is the same as the sum of the number and 12. Find the number.\r
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document.write( "I managed to write out: 7-3*n=n+12\r
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document.write( "Where do I go from here?\r
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document.write( "Thank You \n" );
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Algebra.Com's Answer #299354 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! 7 less than triple a number is the same as the sum of the number and 12. \n" ); document.write( ": \n" ); document.write( "3n - 7 = n + 12, close to what you had, but you should subtract the 7 \n" ); document.write( ": \n" ); document.write( "subtract n from both sides, add 7 to both sides, then you have: \n" ); document.write( "3n - n = 12 + 7 \n" ); document.write( "2n = 19 \n" ); document.write( "n = \n" ); document.write( "n = 9.5 is the number \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Check it in the original equation \n" ); document.write( "3(9.5) - 7 = 12 + 9.5 \n" ); document.write( "28.5 - 7 = 21.5\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |