1. 7х – 8 = 2х + 17 2. 2х = 3(2х + 1) + 5 3. 7(2х + 3) + х = 4х – 12 4. 7х – 3(4х – 3) =...

Question

1. 7х – 8 = 2х + 17

2. 2х = 3(2х + 1) + 5

3. 7(2х + 3) + х = 4х – 12

4. 7х – 3(4х – 3) = 7(3х + 5)

5. 5(2 – 5х) – 7(4х – 1) = 6х – 42

6. 2(8x – 1) – 8(2x – 3) = 13
Помогите решить (Вариант 22).Это Линейные уравнения

Answer 1

7х-2х=17+8
5х=25
х=25/5
х=5

2х=6х+3+5
2х-6х=8
-4х=8
х=-2

14х+21+х=4х-12
14х+х-4х=-12-21
11х=-33
х=-33/11
х=-3

7х-12х+9=21х+35
7х-12х-21х=35-9
-26х=26
х=26/(-26)
х=-1

10-25х-28х+7=6х-42
-25х-28х-6х=-42-7
-59х=-49
х=49/59

16х-2-16х+24=13
16х-16х=13+2-24
нет корня

Answer 2

7х-2х=17+8
5х=25
х=25/5
х=5

2х=6х+3+5
2х-6х=8
-4х=8
х=-2

14х+21+х=4х-12
14х+х-4х=-12-21
11х=-33
х=-33/11
х=-3

7х-12х+9=21х+35
7х-12х-21х=35-9
-26х=26
х=26/(-26)
х=-1

10-25х-28х+7=6х-42
-25х-28х-6х=-42-7-10
-59х=-59
х=1

в последнем нет корней