Question

please solve this question as soon as possible

Answer 1

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Answer 2

a = -5/9 * 2/3
b = 7/9
c = 17/9 * 2/3
(a+b)+c
(-5/9 * 2/3 + 7/9 )+ 17/9 * 2/3

= (-10/27 + 7/9 )+ 34/27

=(-10+21)/27 + 34/27

=11/27+ 34/27
= 45/27
= 5/3
a+ (b+c)
-5/9 * 2/3+ (7/9 + 17/9 * 2/3)
= -10/27 + (7/9 + 34/27)
= -10/27 + (21+34)/27
= -10/27 + 55/27
= 45/27
= 5/3
hence
a+(b+c)= (a+b)+c