1)32:(x*9)=4
9x=32:4
9x=8
x=8/9
2)7/x-28=42
7/x=70
x=0.1
3)48/x+15=23
48/x=23-15
48/x=8
x=6
4)(30-x):3=6
(30-x)=3*6
30-x=18
x=12
Удачи
1) 32 : 4=(x * 9)
8=x * 9
2)7 : x=42-28
7 : x = 70
x = 0.1
3)48 : x + 15 = 23
48 : x = 23 - 15
48 : x = 8
x = 6
4)(30 - x) : 3 = 6
30 - x = 18
-x = -12
x = 12
1)32:(x*9)=4
9x=32:4
9x=8
x=8/9
2)7/x-28=42
7/x=70
x=0.1
3)48/x+15=23
48/x=23-15
48/x=8
x=6
4)(30-x):3=6
(30-x)=3*6
30-x=18
x=12
Удачи
1) 32 : 4=(x * 9)
8=x * 9
x=8/9
2)7 : x=42-28
7 : x = 70
x = 0.1
3)48 : x + 15 = 23
48 : x = 23 - 15
48 : x = 8
x = 6
4)(30 - x) : 3 = 6
30 - x = 18
-x = -12
x = 12