[A+B]+C=A+[B+C]
A=2
B=5
C=8
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Raghav138:
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Let [A+B]C=LHS
&A+[B+C]=RHS
We ned to prove LHS =RHS
LHS=[2+5]+8=15
RHS=2+[5+8]=15
Therefore,LHS=RHS= 15
Hence proved
&A+[B+C]=RHS
We ned to prove LHS =RHS
LHS=[2+5]+8=15
RHS=2+[5+8]=15
Therefore,LHS=RHS= 15
Hence proved
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