Question

Verify x +(y+z)=(x+y)+z(i) question is x= 2/3,y=-5/6,z=-7/9

Answer 1

Step-by-step explanation:

x+(y+z)=(x+y)+z

2/3+(-#+#+#

Answer 2

Answer:

True

Step-by-step explanation:

$\frac{2}{3} + ( \frac{ - 5}{6} + \frac{ - 7}{9}) = ( \frac{2}{3} + \frac{ - 5}{6}) + \frac{ - 7}{9} \\ \frac{2}{3} + ( - \frac{5}{6} - \frac{7}{9} ) \: = ( \frac{2}{3} - \frac{5}{6}) + \frac{ - 7}{9} \\ \frac{2}{3} - \frac{29}{18} \: \: \: \: \: \: \: \: \: \: \: \: = \frac{ - 1}{6} - \frac{7}{9} \\ - \frac{17}{18} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = - \frac{17}{18} \\ true \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = true$

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