Question

уравнения
1) 4(X-6)=X-9
2)6-3(X+1)=7-X

Answer 1

Пошаговое объяснение:

4(X-6)=X-9

4х-24=х-9

4х-х= -9+24

3х= 15

х=15:3

х=5

6 - 3(х + 1) = 7 - х

6 - 3х - 3 = 7 - х

3 - 3х = 7 - х

-3х + х = 7 - 3

-2х = 4

х = 4 : (-2)

х = -2

Answer 2

1) 4 (х - 6) = х - 9

4х - 24 = х - 9

4х - х = -9 + 24

3х = 15

х = 15 : 3

х = 5

Проверка:

4 (5 - 6) = 5 - 9

4 · (-1) = -4

-4 = -4

2) 6 - 3(х + 1) = 7 - х

6 - 3х - 3 = 7 - х

3 - 3х = 7 - х

-3х + х = 7 - 3

-2х = 4

х = 4 : (-2)

х = -2

Проверка:

6 - 3(-2 + 1) = 7 - (-2)

6 - (-6) - 3 = 7 + 2

6 + 6 - 3 = 9

9 = 9