document.write( "Question 91038: A parent rewards a child with 50 cents for each correctly solved mathematics problem and fines the child 30 cents for each incorrectly solved problem. If the child nets $22.00 after 100 problems, how many problems were solved correctly?\r
\n" ); document.write( "\n" ); document.write( "a. 30
\n" ); document.write( "b. 35
\n" ); document.write( "c. 45
\n" ); document.write( "d. 53
\n" ); document.write( "e.
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Algebra.Com's Answer #66070 by checkley75(3666)\"\" \"About 
You can put this solution on YOUR website!
50x-30(100-x)=2200
\n" ); document.write( "50x-3000+30x=2200
\n" ); document.write( "80x=2200+3000
\n" ); document.write( "80x=5200
\n" ); document.write( "x=5200/80
\n" ); document.write( "x=65 correct answers.
\n" ); document.write( "100-65=35 incorrect answers.
\n" ); document.write( "proof
\n" ); document.write( "50*65-30*35=2200
\n" ); document.write( "3250-1050=2200
\n" ); document.write( "2200=2200
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