document.write( "Question 327746: 3/y=7/4-1/5\r
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Algebra.Com's Answer #234765 by checkley77(12844)\"\" \"About 
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3/y=7/4-1/5 find the LCD (4*5=20)
\n" ); document.write( "3/y=(7*5-1*4)/4*5
\n" ); document.write( "3/y=(35-4)/20
\n" ); document.write( "3/y=31/20 cross multiply
\n" ); document.write( "31y=3*20
\n" ); document.write( "31y=60
\n" ); document.write( "y=60/31 ans.
\n" ); document.write( "Proof:
\n" ); document.write( "3/(60/31)=7/4-1/5
\n" ); document.write( "3*31/60=(31/20
\n" ); document.write( "93/60=31/20 reduce the left side fraction.
\n" ); document.write( "31/20=31/20\r
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