document.write( "Question 69673: $\"%2Bx-7=7\"$ x-7 is in square sign\r
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Algebra.Com's Answer #49630 by funmath(2933) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"%2Bx-7=7\"$ x-7 is in square sign
\n" ); document.write( " $\"sqrt%28x-7%29=7\"$
\n" ); document.write( " $\"%28sqrt%28x-7%29%29%5E2=7%5E2\"$
\n" ); document.write( " $\"x-7=49\"$
\n" ); document.write( " $\"x-7%2B7=49%2B7\"$
\n" ); document.write( " $\"highlight%28x=56%29\"$
\n" ); document.write( "With these type of equations, always check the solutions because you can do everything right and get an extraneous solution (false).
\n" ); document.write( " $\"sqrt%2856-7%29=7\"$
\n" ); document.write( " $\"sqrt%2849%29=7\"$
\n" ); document.write( " $\"7=7\"$ It works, x=56 is a valid solution.
\n" ); document.write( "Happy Calculating!!!\r
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