Решите уровнение 1)6х=28-x 2)9x-26=30-5x 3)7-3x=6x-56 4)0,9х-7,4= 00,4+ 4,3 5)5,8- 1,6х=...

1)
$6x = 28 - x \\ 7x = 28 \\ x = 4$
2)
$9x - 26 = 30 - 5x \\ 14x = 56 \\ x = 4$
3)
$7 - 3x = 6x - 56 \\ - 9x = - 63 \\ x = 7$
4)
$0.9x - 7.4 = 0.4 + 4.3 \\ 0.9x = 12.1 \\ x = \frac{121}{9} \\ x = 13 \frac{4}{9}$
5)
$5.8 - 1.6x = 0.3x - 1.8 \\ - 1.9x = - 7.6 \\ x = 4$
6) нет х

7)
$5x - 20 = x + 8 \\ 4x = 28 \\ x = 7$
8)
$9 - 7x - 21 = 5 - 6x \\ - x = 17 \\ x = - 17$