document.write( "Question 164969: I need help solving this question:\r
\n" ); document.write( "\n" ); document.write( "Solve the following system for x and y:
\n" ); document.write( " \"+sqrt%28x%29-2sqrt%28y%29=-1\"
\n" ); document.write( " \"+3sqrt%28x%29%2B4sqrt%28y%29=17\"
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Algebra.Com's Answer #121587 by Mathtut(3670)\"\" \"About 
You can put this solution on YOUR website!
solve similtaneously: multiply top equation by -3 then add to 2nd equation \r
\n" ); document.write( "\n" ); document.write( "-3(\"+sqrt%28x%29-2sqrt%28y%29=-1\") you get \"-3sqrt%28x%29%2B6sqrt%28y%29=+3\"
\n" ); document.write( " add to \"+3sqrt%28x%29%2B4sqrt%28y%29=17\" and the x terms cancel out so you end up with \"10sqrt%28y%29=20\". now square both sides and you get 100y=400 y=4 plugin y=4 to either equation, I chose the 1st, to get find x. sqrt(x)-2sqrt(4)=-1 so sqrt(x)-2(2)=-1 and sqrt(x)=3 now square both terms to get rid of sqrt(x) and your left with x=9 \r
\n" ); document.write( "\n" ); document.write( "answer: x=9
\n" ); document.write( " y=4
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