Answer :
How many blocks away from school does she live now is 9 blocks away from school.
First step is to calculate the number of blocks between the house she was living before and the school
Blocks=42 blocks/3
Blocks=14 blocks
Second step is to calculate how many blocks away from school does she live now
Number of blocks=14 blocks- 5 blocks
Number of blocks=9 blocks
Inconclusion How many blocks away from school does she live now is 9 blocks away from school
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