document.write( "Question 196978: The average of two numbers is 7. Find the numbers if three times one of the numbers is one half the other number.
\n" ); document.write( "I tried using substitution from the two equations given, which I think are :
\n" ); document.write( "(x + y) / 2 = 7 and
\n" ); document.write( "3x = 1/2y
\n" ); document.write( "But I didn't have any luck
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Algebra.Com's Answer #147659 by vleith(2983)\"\" \"About 
You can put this solution on YOUR website!
You have the basic equations correct
\n" ); document.write( "\"%28x%2By%29%2F2+=+7+\"
\n" ); document.write( "\"x%2By+=+14\"\r
\n" ); document.write( "\n" ); document.write( "\"3x+=+y%2F2\"
\n" ); document.write( "\"6x+=+y\"\r
\n" ); document.write( "\n" ); document.write( "So
\n" ); document.write( "\"x%2By+=+14\"
\n" ); document.write( "\"x+%2B+6x+=+14\"}
\n" ); document.write( "\"7x+=+14\"
\n" ); document.write( "\"x+=+2\"\r
\n" ); document.write( "\n" ); document.write( "And \"6%2A2+=+y\"
\n" ); document.write( "\"12+=+y\"\r
\n" ); document.write( "\n" ); document.write( "Check for answers. Is the average of 2 and 12 = 7?
\n" ); document.write( "
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