A=1/3 ,B=-3/4 ,C=-8/9 verify (a+b)+c=a+(b+c)
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LHS
(a+b)+c
=(1/3+(-3/4)) +(-8/9)
=(1/3-3/4) -8/8
=(4-9)/12+(-8/9)
=-5/12-8/9
=(-15-32)/36
=-47/36
RHS
a+(b+c)
=1/3+(-3/4+(-8/9))
=1/3+(-3/4-8/9)
=1/3+((-27-32)/36)
=1/3-59/36
=(12-59)/36
=-47/36
Since, LHS=RHS
Hence,Verified
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