document.write( "Question 1174349: Lance and Lexi are playing a number-guessing game. Lance asks Lexi to
\n" ); document.write( "think of a positive number, triple the number, square the result, and then
\n" ); document.write( "add 7. If Lexi’s answer is 43, what was the original number? Use the
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Algebra.Com's Answer #799781 by ikleyn(52873) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "Lance and Lexi are playing a number-guessing game. Lance asks Lexi to
\n" ); document.write( "think of a positive number, triple the number, square the result, and then
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\n" ); document.write( "concept of inverse function in your solutions.
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document.write( "Moving backward,\r\n" );
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document.write( "(1)  subtract 7 from 43.  Get  43-7 = 36.\r\n" );
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document.write( "(2)  Take the square root of 36.  Get   = 6.\r\n" );
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document.write( "                                  (we accept only POSITIVE square root, according to the condition).\r\n" );
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document.write( "(3)  Divide 6 by 3.   Get   = 2.   \r\n" );
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document.write( "It is the ANSWER.  \r\n" );
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