Question

if a=-2b=-5c=-6then vertify that (a+b)+c=a+(b+c)​

Answer 1

a=-6 ; b=(-6)/(-2)=3 ; c=(-6)/(-5)=6/5

Now,L.H.S,

(a+b)+c

={(-6)+3}+(6/5)

=(-3)+(6/5)

=[{(-3)×5}+(6×1)] /5

=[(-15)+(6)] /5

=(-9)/5

R.H.S,

a+(b+c)

=(-6)+{3+(6/5)}

=(-6)+[{(3×5)+(6×1)}/5]

=(-6)+[(15+6)/5]

=(-6)+[21/5]

= [{(-6)×5} + (21×1)] / 5

={(-30)+21}/5

=(-9)/5

hence, L.HS=R.H.S(proved)