Ответ:
1)
5/6x=-15
x = -15 * 6/5
x = -18
2)
-2 5/6x=17/18
-17/6x = 17/18
x = -17/18 * 6/17
x = -1/3
3)
4x=24+x
4x — x = 24
3x = 24
x = 24 : 3
x = 8
4)
8x-8=20-6x
8x + 6x = 20 + 8
14x = 28
x = 28 : 14
x = 2
5)
9-4x=3x-40
3x + 4x = 9 + 40
7x = 49
x = 49 : 7
x = 7
6)
0,6x-5,4=-0,8x+5,8
0,6x + 0,8x = 5,8 + 5,4
1,4x = 11,2
x = 11,2 : 1,4
x = 8
7)
4,7-1,1x=0,5x-3,3
0,5x + 1,1x = 4,7 + 3,3
1,6x = 8
x = 8 : 1,6
x = 5
8)
5/6x+16=4/9x+9
5/6x — 4/9x = 9 — 16
15/18x — 8/18x = -7
7/18x = -7
x = -7 * 18/7
x = -18