document.write( "Question 629439: what number is three more than twice the other number if the sum of the two numbers is 21 \n" ); document.write( "
Algebra.Com's Answer #396266 by algebrahouse.com(1659)\"\" \"About 
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\"what number is three more than twice the other number if the sum of the two numbers is 21\"\r
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\n" ); document.write( "\n" ); document.write( "x = one number
\n" ); document.write( "2x + 3 = other number {one number is three more than twice the other}\r
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\n" ); document.write( "\n" ); document.write( "x + 2x + 3 = 21 {their sum is 21}
\n" ); document.write( "3x + 3 = 21 {combined like terms}
\n" ); document.write( "3x = 18 {subtracted 3 from each side}
\n" ); document.write( "x = 6 {divided each side by 3}\r
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\n" ); document.write( "\n" ); document.write( "2x + 3 {other number}
\n" ); document.write( "= 2(6) + 3 {substituted 6, in for x, into 2x + 3}
\n" ); document.write( "= 12 + 3 {multiplied}
\n" ); document.write( "= 15 {added}\r
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\n" ); document.write( "\n" ); document.write( "one number is 6
\n" ); document.write( "other number is 15
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