Пж помогите, дам 80 балла
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Ответы
Ответ:
Пошаговое объяснение:
![](https://files.topotvet.com/i/9bc/9bcf40cd836abfde607f038b6910e690.jpg)
Ответ:
Пошаговое объяснение:
1)
3/4 / 1/3x+1/4 + 2/3 = 1
3/4 / 1/3х+1/4 = 1 - 2/3
3/4 / 1/3х+1/4 =1/3
1/3х + 1/4 = 3/4 * 3 / 1
1/3х + 1/4 =9/4 : 1
1/3х + 1/4 = 9/4
1/3х = 9/4 - 1/4
1/3х = 8/4
1/3х = 2
х = 2 : 1/3
х = 2 * 3/1
х = 6/1
х = 6
2)
5/6 / 1/4х-7/12 - 1/2 = 3/14
5/6 / 1/4х-7/12 = 3/14 + 1/2
5/6 / 1/4х-7/12 = 3/14 + 7/14
5/6 / 1/4х- 7/12 = 10/14
1/4х - 7/12 = 5/6 * 14 /10
1/4х - 7/12 = 70/6 / 10
1/4х - 7/12 = 35/3 * 1/10
1/4х - 7/12 = 35/30
1/4х - 7/12 = 7/6
1/4х = 7/6 + 7/12
1/4х = 14/12 + 7/12
1/4х = 21/12
х = 21/12 : 1/4
х = 21/12 * 4/1
х = 84/12
х = 7
3)
2. 1/3 / 3/8х-5/6 + 5. 2/3 = 9. 1/6
2. 1/3 / 3/8х-5/6 = 9. 1/6 - 5. 2/3
2. 1/3 / 3/8х-5/6 = 9. 1/6 - 5. 4/6
2. 1/3 / 3/8х-5/6 = 8. 7/6 - 5. 4/6
2. 1/3 / 3/8х-5/6 = 3. 3/6
7/3 / 3/8х-5/6 = 21/6
3/8х - 5/6 = 7/3 * 6 / 21
3/8х - 5/6 = 42/3 / 21
3/8х - 5/6 = 14/21
3/8х - 5/6 = 2/3
3/8х = 2/3 + 5/6
3/8х = 4/6 + 5/6
3/8х = 9/6
х = 9/6 : 3/8
х = 9/6 * 8/3
х = 3/3 * 4/1
х = 1 * 4
х = 4