Question

Помогите пожалуйста! Очень сильно надо.

Answer 1

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Answer 2

8) 9х - 1 = 8х + 7
9х - 8х = 1 + 7
1х = 8
х = 8;

9) 4х - 6 = 2х + 12
4х - 2х = 6 + 12
2х = 18
х = 18 ÷ 2
х = 9;

10) 3х + 3 = 2х + 13
3х - 2х = 13 - 3
1х = 10
х = 10;

11) 9 - 3х = 20 - 4х
4х - 3х = 20 - 9
1х = 11
х = 11;

12) 7х - 1 = 5х + 23
7х - 5х = 1 + 23
2х = 24
х = 24 ÷ 2
х = 12;

13) 2 - 3х = 28 - 5х
5х - 3х = 28 - 2
2х = 26
х = 26 ÷ 2
х = 13;

14) 6х + 3 = 5х + 17
6х - 5х = 17 - 3
1х = 14;
х = 14.