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= [1,5 - 25/9 : 24/10]/(6 - 9) * 1/9 = [1,5 - 25/9 * 10/24]/(- 3 * 1/9) =
= [ 1,5 - 250/216]/(- 3/9) = (1,5 - 1 34/216)/ (- 1/3) = (1,5 - 1 17/108)/(- 1/3) =
= (1 5/10 - 1 17/108)/(- 1/3) = (1 540/1080 - 1 170/1080)/(- 1/3) =
= 370/1080 : - 1/3 = 37/108 * - 3 = - 111/108 = - 1 3/108 = - 1 1/36