document.write( "Question 959251: Mother and Maria worked out a deal. For every day Maria walks the family dogs she gets $1.00. For every day Maria doesn't walk the dog she gives back $1.00 back to her mother. Maria made a total of $9.00 during the month of March. How many days did Maria walk the dog in March? \n" ); document.write( "
Algebra.Com's Answer #586338 by macston(5194)\"\" \"About 
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w=walked; d=did not walk
\n" ); document.write( "w+d=31 (31 days in March)
\n" ); document.write( "d=31-w
\n" ); document.write( "$1w-$1d=$9 Substitute for d
\n" ); document.write( "$1w-$1(31-w)=$9
\n" ); document.write( "$1w-$31+$1w=$9 Add $31 to each side.
\n" ); document.write( "$2w=$40 Divide each side by $2
\n" ); document.write( "w=20 ANSWER She walked the dog 20 days.
\n" ); document.write( "CHECK:
\n" ); document.write( "d=31-w=31=20=11 She did not walk the dog 11 days.
\n" ); document.write( "$1w-$1d=$9
\n" ); document.write( "$1(20)-$1(11)=$9
\n" ); document.write( "$20-$11=$9
\n" ); document.write( "$9=$9
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