1) -2х + 16 = 5х + 30
-2х - 5х = 30 - 16
- 7х = 14
х = 14 : (-7)
х = - 2
2) 3 1/4х - 4 5/7 = 3 5/12х - 3 3/14
13/4х - 33/7 = 41/12х - 45/14
13/4х - 41/12х = - 45/14 + 33/7
39/12х - 41/12х = - 45/14 + 66/14
- 2/12х = 21/14
- 1/6х = 3/2
х = 3/2 : (-1/6)
х = 3/2 * (- 6/1)
х = - 18/2
х = - 9
3) 5/12 - 7/9х = 10 5/12 - 3х
7/9х + 3х = 5/12 - 125/12
34/9х = - 120/12
34/9х = - 10
х = - 10 : 34/9
х = - 10/1 * 9/34
х = - 90/34
х = - 45/17
х = - 2 11/17
1) 7х - 11 = 10х + 16
7х - 10х = 16 + 11
- 3х = 27
х = 27 : (-3)
х = - 9
2) 2 1/3х + 2 5/12 = 1 3/4 + 3 2/9х
7/3х - 29/9х = 7/4 - 29/12
21/9х - 29/9х = 21/12 - 29/12
- 8/9х= - 8/12
х = - 8/12 : (-8/9)
х = 8/12 * 9/8
х = 9/12
х = 3/4
х = 0,75
3) 3/7 - 1/4х = 5 3/7 - 4х
1/4х + 4х = 3/7 - 38/7
1/4х + 16/4х = - 35/7
17/4х = - 5
х = - 5 : 17/4
х = - 5/1 * 4/17
х = - 20/17
х = - 1 3/17