Question

verify that (a+b)+c = a+(b+c),where a=2/3,b=-3/4,c=7/5

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Answer 1

Answer:

Step-by-step explanation:

2/3+(-3/4)+7/5=2/3(-3/4+7/5)

8-9/12+7/5=2/3(-15+28/20)

-1/12+7/5=2/3+13/20

-5+84/60=40+39/60

79/60=79/60

Answer 2

Step-by-step explanation:

$( \frac{2}{3} + - \frac{3}{4} ) + \frac{7}{5} = \frac{2}{3} + ( - \frac{3}{4} + \frac{7}{5} )$

$→ \: - \frac{1}{12} \: + \: \frac{7}{5} \: = \: \frac{2}{3} + \: \frac{13}{20}$

$→ \: \frac{79}{60} = \: \frac{79}{60}$

$proved$