Задание Νο 1:
6 * ( 5/12 - 1 1/6 * х ) - 15 * ( 2/3 * х - 2 1/5 ) - 35,5...
Если х = - 3/17, тогда:
6 * ( 5/12 - 1 1/6 * ( - 3/17 )) - 15 * ( 2/3 * ( - 3/17 ) - 2 1/5 ) - 35,5 = - 69.
Решение по действиям:
1) 1 1/6 * ( - 3/17 ) = 7/6 * ( - 3/17 ) = - 21/102 = - 7/34.
2) 5/12 - 7/34 = 85/204 - 42/204 = 43/204.
3) 6 * 43/204 = 6/1 * 43/204 = 258/204 = 43/34 = 1 9/34.
4) 2/3 * ( - 3/17 ) = - 6/51 = - 2/17.
5) - 2/17 - 2 1/5 = - 10/85 - 2 17/85 = - 2 27/85.
6) 15 * ( - 2 27/85 ) = 15/1 * ( - 197/85 ) = 2955/85 = 591/17 = 34 13/17.
7) 1 9/34 - 34 13/17 = 1 9/34 - 34 26/34 = - 33 17/34 = - 33 1/2 = - 33 5/10 = - 33,5.
8) - 33,5 - 35,5 = - 69.
Ответ: - 69.
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Задание Νο 1:
6 * ( 5/12 - 1 1/6 * х ) - 15 * ( 2/3 * х - 2 1/5 ) - 35,5...
Если х = - 3/17, тогда:
6 * ( 5/12 - 1 1/6 * ( - 3/17 )) - 15 * ( 2/3 * ( - 3/17 ) - 2 1/5 ) - 35,5 = - 69.
Решение по действиям:
1) 1 1/6 * ( - 3/17 ) = 7/6 * ( - 3/17 ) = - 21/102 = - 7/34.
2) 5/12 - 7/34 = 85/204 - 42/204 = 43/204.
3) 6 * 43/204 = 6/1 * 43/204 = 258/204 = 43/34 = 1 9/34.
4) 2/3 * ( - 3/17 ) = - 6/51 = - 2/17.
5) - 2/17 - 2 1/5 = - 10/85 - 2 17/85 = - 2 27/85.
6) 15 * ( - 2 27/85 ) = 15/1 * ( - 197/85 ) = 2955/85 = 591/17 = 34 13/17.
7) 1 9/34 - 34 13/17 = 1 9/34 - 34 26/34 = - 33 17/34 = - 33 1/2 = - 33 5/10 = - 33,5.
8) - 33,5 - 35,5 = - 69.
Ответ: - 69.