document.write( "Question 178902This question is from textbook ALGEBRA BLITZER 3RD EDITION
\n" ); document.write( ": 3y/4y-20+9y/6y-30 this is the problem i can't figure out...it says add or subtract as indicated. simplify the result if possible. i have figured out the other porblems yet i am stumped on this one. the book answer says 9y/4(y-5)
\n" ); document.write( "i have contemplated this over and over yet can not see how they got this answer.
\n" ); document.write( "thank you for your time. \n" ); document.write( "
Algebra.Com's Answer #133858 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
You can factor both denominators,
\n" ); document.write( "\"3y%2F%284y-20%29%2B9y%2F%286y-30%29=3y%2F%284%28y-5%29%29%2B9y%2F%286%28y-5%29%29\"
\n" ); document.write( "\"3y%2F%284y-20%29%2B9y%2F%286y-30%29=%283y%2F4%29%2F%28y-5%29%2B%289y%2F6%29%2F%28y-5%29\"
\n" ); document.write( "Since they have the same denominator, we can just add numerators,
\n" ); document.write( "\"3y%2F%284y-20%29%2B9y%2F%286y-30%29=%28%283y%2F4%29%2B%289y%2F6%29%29%2F%28y-5%29\"
\n" ); document.write( "Let's focus on the numerator only and simplify it,
\n" ); document.write( "\"%283y%2F4%29%2B%289y%2F6%29=%283%2F3%29%283y%2F4%29%2B%282%2F2%29%289y%2F6%29\"
\n" ); document.write( "\"%283y%2F4%29%2B%289y%2F6%29=%289y%2F12%29%2B%2818y%2F12%29\"
\n" ); document.write( "\"%283y%2F4%29%2B%289y%2F6%29=%289y%2B18y%29%2F12%29\"
\n" ); document.write( "\"%283y%2F4%29%2B%289y%2F6%29=%2827y%29%2F12%29\"
\n" ); document.write( "\"%283y%2F4%29%2B%289y%2F6%29=%289y%29%2F4%29\"
\n" ); document.write( "Now we replace that in the numerator,
\n" ); document.write( "\"3y%2F%284y-20%29%2B9y%2F%286y-30%29=%28%283y%2F4%29%2B%289y%2F6%29%29%2F%28y-5%29\"
\n" ); document.write( "\"3y%2F%284y-20%29%2B9y%2F%286y-30%29=%289y%2F4%29%2F%28y-5%29\"
\n" ); document.write( "\"3y%2F%284y-20%29%2B9y%2F%286y-30%29=9y%2F%284%28y-5%29%29\" \n" ); document.write( "
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