Question

For x =1/18 , y =-3/5 , z = 7/20,
.find the values of the expressions (x – y) – z and x – (y – z).

Are they equal?​

Answer 1

x = 1/18 , y = - 3/5 , z = 7/20

❥ ( x - y ) - z = ( 1/18 - [ - 3/5 ] ) - 7/20

1/18 + 3/5 - 7/20

LCM = 180

( 1 x 10 + 3 x 36 - 7 x 9 ) / 180

( 10 + 108 - 63 ) / 180

55/180 or 11/36

❥ x - ( y - z ) = [ 1/18 - ( - 3/5 - 7/20 ) ]

1/18 + 3/5 + 7/20

LCM = 180

( 1 x 10 + 3 x 36 + 7 x 9 ) / 180

( 10 + 108 + 63 ) / 180

181/180

No they aren't equal .