Question

ПОМОГИТЕ ПОЖАЛУЙСТА ДАЮ 18 БАЛЛОВ

Answer 1

1.
-2х - 7 = -4х
-2х + 4х = 7
2х = 7
х = 7/2
х = 3 1/2

2.
х - 2 = -3х
х + 3х = 2
4х = 2
х = 2/4
х = 1/2

3.
1 - 10х = 5х + 10
-10х - 5х = 10 - 1
-15х = 9
х = -9/15
х = -3/5

4.
-5 + 2х = -2х - 3
2х+2х = -3 + 5
4х = 2
х = 2/4
х = 1/2

5.
4(х+1) = -9
4х + 4 = -9
4х = -9 - 4
4х = -13
х = -13/4
х = -3 1/2

6.
2(х-6) = 5
2х - 12 = 5
2х = 5 + 12
2х = 17
х = 17/2
х = 8 1/2

7.
10(х+3) = 3
10х + 30 = 3
10х = 3 - 30
10х = -27
х = -27/10
х = -2 7/10