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14 Apr, 2020 @ 11:46pm 
7x = −30 + 2x
7x − 2x = −30
5x = −30
x = −30 : 5
x = −6
Решение 2
16 − 18x = −25x − 12
−18x + 25x = −12 − 16
7x = −28
x = −28 : 7
x = −4
Решение 3
−17x + 20 = 7x − 28
−17x − 7x = −28 − 20
−24x = −48
x = −48 : (−24)
x = 2
Решение 4
20 − 2x = 27 + x
−2x − x = 27 − 20
−3x = 7
x
=

7
3
=

2
1
3
Решение 5
0,2x + 4,3 = 0,4x − 6,5
0,2x − 0,4x = −6,5 − 4,3
−0,2x = −10,8
x = −10,8 : (−0,2)
x = 54
Решение 6
0,6x + 100 = 0,9x + 1
0,6x − 0,9x = 1 − 100
−0,3x = −99
x = −99 : (−0,3)
x = 330
Решение 7

9
14
x
+
18
=

2
3
x
+
17


9
14
x
+
2
3
x
=
17

18


27
42
x
+
28
42
x
=

1

1
42
x
=

1

x
=

1
:
1
42

x
=

1

42
1

x = −42
Решение 8

8
15
x

11
=
4
9
x
+
11


8
15
x

4
9
x
=
11
+
11


24
45
x

20
45
x
=
22


44
45
x
=
22

x
=
22
:
(

44
45
)

x
=
22

(

45
44
)

x
=
1

(

45
2
)

x
=


21 Feb, 2020 @ 8:54am 
Kak zhe on EBASHITTTT +rep