document.write( "Question 1070249: It took Andrea 2.7 hours to drive to her​ mother's house on Wednesday morning. On her return trip on Thursday night, traffic was heavier, so the trip took her 3 hours. Her average speed on Thursday was 7 mph slower than on Wednesday. What was her average speed on Thursday?\r
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Algebra.Com's Answer #685397 by Alan3354(69443)\"\" \"About 
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It took Andrea 2.7 hours to drive to her​ mother's house on Wednesday morning. On her return trip on Thursday ​night, traffic was​ heavier, so the trip took her 3 hours. Her average speed on Thursday was 7 mph slower than on Wednesday. What was her average speed on Thursday?
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\n" ); document.write( "r = speed going
\n" ); document.write( "d = 2.7r
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\n" ); document.write( "d = 3*(r-7)
\n" ); document.write( "Solve for r
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