Question

$- 20 + ( \frac{3}{ - 5} + \frac{ - 7}{ - 10} ) = ( - 20 + \frac{3}{ - 5} ) + \frac{ - 7}{ - 10}$
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Answer 1

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Answer 2

-20 + [(3/-5) + (-7/-10)] = [-20 + (3/-5)] + (-7/-10)

=> -20 + [(3/-5) + (7/10)] = [-20 + (3/-5)] + (7/10)

=> -20 + [(-6/10) + (7/10)] = [100/-5 + (3/-5)] + (7/10)

=>-20 + [-6+7/10] = [100+3/-5] + (7/10)

=> -20 + 1/10 = 103/-5 + (7/10)

=> -200/10 + 1/10 = -206/10 + 7/10

=> -200+1/10 = -206+7/10

=> -199/10 = -199/10

《LHS = RHS》

《Hence proved, associative property holds true for addition.》

hope it helped :)))