document.write( "Question 681861: one number is 2/5 of another . the sum of their two numbers is 21.find the two numbers. \r
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Algebra.Com's Answer #422929 by ReadingBoosters(3246) $\"\"$ $\"About$

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x is one number
\n" ); document.write( "y is another number
\n" ); document.write( "...
\n" ); document.write( " $\"x+=+%282%2F5%29y\"$
\n" ); document.write( "x+y = 21 : rearrange as x = 21-y
\n" ); document.write( "...
\n" ); document.write( "21 - y = (2/5)y
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\n" ); document.write( "Multiply the entire equation by 5
\n" ); document.write( " $\"5%2821%29+-+5y+=+5%282%2F5%29y\"$
\n" ); document.write( "105 - 5y = 2y
\n" ); document.write( "...
\n" ); document.write( "Isolate the y variable
\n" ); document.write( "105 = 2y + 5y
\n" ); document.write( "105 = 7y
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\n" ); document.write( "Divide both sides by 7
\n" ); document.write( " $\"highlight_green%28y+=+15%29\"$
\n" ); document.write( "x = 21-15 = $\"highlight_green%28x=6%29\"$
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