Ответ:
-5/6
Пошаговое объяснение:
1/6 * (4a - 2) - 1/5 * (5b + 6) = (2/3)a - 1/3 - b - 6/5 = (2/3)a - b - 5/15 - 18/15 = (2/3)a - b - 23/15
при a = 2 1/4, b = 4/5
(2/3)a - b - 23/15 = 2/3 * 2 1/4 - 4/5 - 23/15 = 2/3 * 9/4 - 12/15 - 23/15 = 3/2 - 35/15 = 45/30 - 70/30 = -25/30 = -5/6
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Ответ:
-5/6
Пошаговое объяснение:
1/6 * (4a - 2) - 1/5 * (5b + 6) = (2/3)a - 1/3 - b - 6/5 = (2/3)a - b - 5/15 - 18/15 = (2/3)a - b - 23/15
при a = 2 1/4, b = 4/5
(2/3)a - b - 23/15 = 2/3 * 2 1/4 - 4/5 - 23/15 = 2/3 * 9/4 - 12/15 - 23/15 = 3/2 - 35/15 = 45/30 - 70/30 = -25/30 = -5/6