Question

if x= 2/3, y =13/21 and z=5/7, check that ( x-y) - z≠x - (y-z)

Solve fast,correctly and properly with workings.

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Answer 1

Answer:

LHS

(x-y)-z

{(2/3)-(13/21)}-5/7

1/21-5/7

-98/147

-14/21=-2/3

RHS x-(y-z)

2/3-{(13/21)-(5/7)}

2/3-(-2/21)

2/3+2/21

48/63

16/21

so RHS≠LHS