Verified Answer :

crisforp

3 7 / 10 = 37 / 10 ;
12 = 120 / 10 ;
3 7 / 10 - 12 = 37 / 10 - 120 / 10 = - 83 / 10 ;

7 / 10 = 37 / 10 

12 = 120 / 10 

37 / 10 - 12 = 37 / 10  

120 / 10 = -83 / 10 

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