document.write( "Question 967820: Stuck on how to solve this simultaneous equation \r
\n" ); document.write( "\n" ); document.write( "X^2+y^2=25
\n" ); document.write( "X+y=7\r
\n" ); document.write( "\n" ); document.write( "ASAP please\r
\n" ); document.write( "\n" ); document.write( "Thank you
\n" ); document.write( "

Algebra.Com's Answer #591549 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!
\"x%5E2%2By%5E2=25\"......eq.1
\n" ); document.write( "\"x%2By=7\"......eq.2
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\n" ); document.write( "\n" ); document.write( "\"x%2By=7\"......eq.2......solve for \"y\"\r
\n" ); document.write( "\n" ); document.write( "\"y=7-x\".....substitute in eq.1\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2%2B%287-x%29%5E2=25\"......eq.1...solve for \"x\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2%2B7%5E2-14x%2Bx%5E2=25\"\r
\n" ); document.write( "\n" ); document.write( "\"2x%5E2-14x%2B49=25\"\r
\n" ); document.write( "\n" ); document.write( "\"2x%5E2-14x%2B49-25=0\"\r
\n" ); document.write( "\n" ); document.write( "\"2x%5E2-14x%2B24=0\"...simplify, both sides divide by \"2\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2-7x%2B12=0\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2-4x-3x%2B12=0\"\r
\n" ); document.write( "\n" ); document.write( "\"%28x%5E2-4x%29-%283x-12%29=0\"\r
\n" ); document.write( "\n" ); document.write( "\"x%28x-4%29-3%28x-4%29=0\"\r
\n" ); document.write( "\n" ); document.write( "\"%28x-3%29%28x-4%29=0\"\r
\n" ); document.write( "\n" ); document.write( "solutions:\r
\n" ); document.write( "\n" ); document.write( "if \"%28x-3%29=0\"=>\"x=3\"
\n" ); document.write( "if \"%28x-4%29=0\"=>\"x=4\"\r
\n" ); document.write( "\n" ); document.write( "substitute in \"y=7-x\" and find \"y\"\r
\n" ); document.write( "\n" ); document.write( "\"y=7-x\" if \"x=3\"
\n" ); document.write( "\"y=7-3\"
\n" ); document.write( "\"y=4\"\r
\n" ); document.write( "\n" ); document.write( "\"y=7-x\" if \"x=4\"
\n" ); document.write( "\"y=7-4\"
\n" ); document.write( "\"y=3\"\r
\n" ); document.write( "\n" ); document.write( "so, your solutions are:\r
\n" ); document.write( "\n" ); document.write( "\"x=3\" and \"y=4\"\r
\n" ); document.write( "\n" ); document.write( "or \r
\n" ); document.write( "\n" ); document.write( "\"x=4\" and \"y=3\"\r
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