document.write( "Question 1136081: A mathematical test consists of 20 problems .at the beginning everyone started with 20 points. for the correct answer, everyone gets 1 point for incorrect or missed question 1 point is subtracted.mary final result is 24 how many correct answers did marry give \n" ); document.write( "

Algebra.Com's Answer #753862 by ikleyn(52879) $\"\"$ $\"About$

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document.write( "Let x be the number of correct answers.\r\n" );
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document.write( "Then the number of incorrect or missed is (20-x).\r\n" );
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document.write( "The balance equation is\r\n" );
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document.write( "    20 + x - (20-x) = 24.\r\n" );
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document.write( "Simplify and solve for x:\r\n" );
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document.write( "    20 + x - 20 + x = 24\r\n" );
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document.write( "    2x = 24               ===============>        x = 24/2 = 12.\r\n" );
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document.write( "ANSWER.  12 correct answers.\r\n" );
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document.write( "CHECK.  12 scores obtained and 8 scores lost.  20 + 12 - 8 = 24.   ! Correct !\r\n" );
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