Question

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

Answer 1

$\huge\bf\underline{Solution:}$

$LHS \\ = (a + b) + c \\ = ( - 8 + ( - 7)) + (6) \\ = (- 15) + 6 \\ = ( - 9)$

$RHS \\ = a + (b + c) \\ = (- 8) + ( - 7 + (6)) \\ = ( - 8) + ( - 1) \\ = (- 9)$

LHS = RHS

(-9) = (-9)

HENCE PROVED

Answer 2

LHS = (a+b) +c

= {(-8)+(-7)} + 6

= (-15) +6

= (-9)......(i)

RHS = a +(b+c)

= (-8) + {(-7)+6}

= (-8) + (-1)

= (-9)..... (ii)

so, LHS = RHS (Proved)