Question

If a=-8,b =-7,c =6 verify that (a+b) +c =a+(b+c)​

Answer 1

$(a + b) + c = a + (b + c) \\ lhs \\ (a + b) + c = ( - 8 - 7) + 6 \\ = - 15 + 6 \\ = - 9 \\ \\ rhs \\ a + (b + c) = - 8 + ( - 7 + 6) \\ = - 8 - 1 \\ = - 9 \\ \\ lhs \: = rhs \: \\ \\ hence \: verified$

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