22 By taking a=3/7, b=3/7 and c=3/7 verify a+(b+c)=(a+b)+C.
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Step-by-step explanation:
a+(b+c)=(a+b)+c
given
a=3/7
b=3/7
c=3/7
taking LHS
a+(b+c)
=3/7+(3/7+3/7)
=3/7+6/7
=9/7
taking LHS
(a+b)+c
=(3/7+3/7)+3/7
=6/7+3/7
=9/7
therefore
LHS=RHS
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