5х - 9 = 3х + 1
2х = 10
х = 5
-2у + 14 = 8у - 6
-10у = -20
у = 2
(у+8)(-7) = 14
-7у - 56 = 14
-7у = 70
у = - 10
0,8х + 16 = 20 + 0,7х
0,1х = 4
х = 40
6(х-1) = 12
6х - 6 = 12
6х = 18
х = 3
8,9х + 17,54 = 5,4х + 2,84
3,5х = -14,7
х = -4,2
3/7 - 1/4х = 5 3/7 - 4х
-5 = -15/4 х
-5 = -3,75х
х = - 5/3,75
4(3-х) - 11 = 7(2х-5)
12 - 4х - 11 = 14х - 35
-18х = - 12
х = 1,5
1/4 - 1/3m = 4 1/4 - 3m
4 = -2 2/3 m
m = -2 2/3 ÷ 4
m = - 1/3