Найдите корень уравнение (80 баллов дам)
Ответы
Ответ:
Пошаговое объяснение:
1)
4/7(х - 1) = 2/7 + х
4/7х - 4/7 = 2/7 + х
4/7х - х = 2/7 + 4/7
-3/7х = 6/7
х = 6/7 : (-3/7)
х = 6/7 * (-7/3)
х = -6/3
хх = -2
2)
4. 5/9 - 1/6x = 5(1 + 0,1x)
4. 5/9 - 1/6x = 5 + 0,5x
-1/6х - 0,5х = 5 - 4. 5/9
-1/6х - 1/2х = 4. 9/9 - 4. 5/9
-1/6х - 3/6х = 4/9
-4/6х = 4/9
х = 4/9 : (-4/6)
х = 4/9 * (-6/4)
х = -6/9
х = -2/3
3)
5(х - 1,5) = 4. 2/3х - 8. 3/14
5х - 7,5 = 4. 2/3х - 8. 3/14
5х - 4. 2/3х = -8. 3/14 + 7,5
4. 3/3х - 4. 2/3х = -8. 3/14 + 7. 5/10
1/3х = -8. 3/14 + 7. 1/2
1/3х = -8. 3/14 + 7. 7/14
1/3х = -7. 17/14 + 7. 7/14
1/3х = -10/14
х = -10/14 : 1/3
х = -10/14 * 3/1
х = -30/14
х = -15/7
х = -2. 1/7
4)
1. 7/9х - 1. 1/9 = 4. 2/9(1 - х)
1. 7/9х - 1. 1/9 = 4. 2/9 - 4. 2/9х
1. 7/9х + 4. 2/9х = 4. 2/9 + 1. 1/9
5. 9/9х = 5. 3/9
6х = 5. 1/3
6х = 16/3
х = 16/3 : 6
х = 16/3 * 1/6
х = 16/18
х = 8/9
Ответ:
Пошаговое объяснение:
1)4/7*(х - 1) = 2/7 + х
4/7х - 4/7 = 2/7 + х
4/7х - х = 2/7 + 4/7
-3/7х = 6/7
х = 6/7 * (-7/3)
х = -6/3
х = -2
2)4 5/9 - 1/6x = 5*(1 + 0,1x)
4 5/9 - 1/6x = 5 + 0,5x
-1/6х - 0,5х = 5 - 4 5/9
-1/6х - 1/2х = 4/9
-1/6х- 3/6х = 4/9
-4/6х = 4/9
х = 4/9 * (-6/4)
х = -2/3
3) 5(х - 1,5) = 4 2/3х - 8 3/14
5х - 7,5 = 4 2/3х - 8 3/14
5х - 4 2/3х = -8 3/14 +7,5
1/3х = -8 3/14 + 7 1/2
1/3х = - 115/14 + 15/2
1/3х = -115/14 + 105/14
1/3х = -10/14
х = -10/14 * 3
х = -30/14
х = -2 1/7
4) 1 7/9х - 1 1/9 = 4 2/9* (1 - х)
1 7/9х - 1 1/9 = 4 2/9 - 4 2/9х
1 7/9х + 4 2/9х = 4 2/9 + 1 1/9
6х = 5 1/3
6х = 16/3
х = 16/3 * 1/6
х = 8/9