Question

verify: (-13/7) + [ (-5/13) + (4/15)] =[(-13/7) + (-5/13)] + 4/15​

Answer 1

LHS

-13/7+[-5/13+4/15]

=-13/7+[(-75+52)/195

=-13/7-23/195

=-2535-161) /1365

=-2696/1365

RHS

=[-13/7-5/13]+4/15

=-169-35) /91+4/15

=-204/91+4/15

=-3060+364) /1365

=-2696/1365