document.write( "Question 972494: my last question in this section and I can't get it right. I hope you can help me.
\n" ); document.write( "i am adding RE's with different denominators. here is the problem:\r
\n" ); document.write( "\n" ); document.write( "5/x^2-15x+50 +9/x^2-x-20\r
\n" ); document.write( "\n" ); document.write( "I went ahead and simplified the first equation to look like this: 5/(x-10)(x-5)
\n" ); document.write( "the second looks like this: 9/(x-5)(x+4)
\n" ); document.write( "now here is where I get stuck. Where do I go from here? I tried to cross multiply using (x-10) and (x+4)
\n" ); document.write( "I came up with 5x+20+9x-90/(x-10)(x-5)(x+4) which would give me the answer:
\n" ); document.write( "14x-70/(x-10)(x-5)(x+4) but the answer key shows the answer as 14/(x-10)(x+4)
\n" ); document.write( "what step am I missing? \n" ); document.write( "

Algebra.Com's Answer #594789 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
I came up with 5x+20+9x-90/(x-10)(x-5)(x+4) which would give me the answer:
\n" ); document.write( " 14x-70/(x-10)(x-5)(x+4) but the answer key shows the answer as 14/(x-10)(x+4)
\n" ); document.write( " what step am I missing?
\n" ); document.write( "-------------
\n" ); document.write( " 14x-70/(x-10)(x-5)(x+4)
\n" ); document.write( "= 14(x-5)/(x-10)(x-5)(x+4)
\n" ); document.write( "Cancel (x-5)
\n" ); document.write( "= 14/(x-10)(x+4) \n" ); document.write( "

\n" );