document.write( "Question 969768: You have a test score of 51. There were 20 problems on quiz. You received 5 points for each correct response and a 2 point deduction for each one incorrect. How many did you correct.\r
\n" ); document.write( "\n" ); document.write( "Please tell me how to set up and solve equation. \n" ); document.write( "

Algebra.Com's Answer #592539 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

You can put this solution on YOUR website!
You have a test score of 51.
\n" ); document.write( " There were 20 problems on quiz.
\n" ); document.write( " You received 5 points for each correct response and a 2 point deduction for each one incorrect. How many did you correct.
\n" ); document.write( ":
\n" ); document.write( "let x = no. of correct problem
\n" ); document.write( "then
\n" ); document.write( "(20-x) = no. of incorrect problems
\n" ); document.write( ":
\n" ); document.write( "5x - 2(20-x) = 51
\n" ); document.write( "5x - 40 + 2x = 51
\n" ); document.write( "5x + 2x = 51 + 40
\n" ); document.write( "7x = 91
\n" ); document.write( "x = 91/7
\n" ); document.write( "x = 13 correct problems
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check this, we know that he got 7 problems wrong
\n" ); document.write( "13 * 5 = 65
\n" ); document.write( "7 * -2 = -14
\n" ); document.write( "---------------
\n" ); document.write( "results: 51 \n" ); document.write( "

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