Question

verify (x+y)+ z = x + ( y+x ) and name the property : when x= -2/5 y=4/3 z= 7/10​

Answer 1

Step-by-step explanation:

$(x + y) + z = x + (y + z) \\ ( - \frac{2}{5} + \frac{4}{3} ) + \frac{7}{10} = - \frac{2}{5} + ( \frac{4}{3} + \frac{7}{10} ) \\ ( \frac{ - 6 + 20}{15} ) + \frac{7}{10} = - \frac{2}{5} + ( \frac{40 + 21}{30} ) \\ \frac{14}{15} + \frac{7}{10} = - \frac{2}{5} + \frac{61}{30} \\ \frac{28 + 21}{30} = \frac{ - 12 + 61}{30} \\ \frac{49}{30} = \frac{49}{30} \\ proved$