Answers

2014-11-27T12:58:55+08:00
2014-11-27T18:30:42+08:00
Let 'x' be the number of miles Demetria drove last week
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since she drove 15 miles more this week than last week and that she drove 120miles this week then,
120 = x + 15
120 - 15 = x 
105 = x
x = 105 miles
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Therefore she drove 105 miles last week.
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