document.write( "Question 417363: Hi can you please help me figure this out. I am not sure if I am doing this right.
\n" ); document.write( "I am trying to decide if the given number is a solution to the given equation.\r
\n" ); document.write( "\n" ); document.write( "5x^2 405; -9\r
\n" ); document.write( "\n" ); document.write( "and if \r
\n" ); document.write( "\n" ); document.write( "3x + 7 = 21; 4\r
\n" ); document.write( "\n" ); document.write( "I am thinking yes to both but I how do I know for sure.\r
\n" ); document.write( "\n" ); document.write( "Thanks for all your help :o)
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Algebra.Com's Answer #292181 by mananth(16946)\"\" \"About 
You can put this solution on YOUR website!
5x^2=408
\n" ); document.write( "x^2=81
\n" ); document.write( "x= +/- 9
\n" ); document.write( "...
\n" ); document.write( "3x+7=21
\n" ); document.write( "3x=21-7
\n" ); document.write( "3x=14
\n" ); document.write( "/3
\n" ); document.write( "x=14/3
\n" ); document.write( "4 not a solution
\n" ); document.write( "
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