Предмет: Алгебра, автор: yliamaksimova60

7x -3(5x+2)=4 помогите пожалуйста​

Ответы

Автор ответа: lizatkacheva21
2

Ответ:

Объяснение:

7x-15x-6=4

-8x-6=4

-8x=4+6

-8x=10

x=-5/4


yliamaksimova60: надеюсь ты правильно решила.
Автор ответа: matilda17562
0
Ответ:
- 1 1/4.
Объяснение:
7x - 3•(5x + 2) = 4
Выполним умножение, раскроем скобки:
7х - 15х - 6 = 4
Оставим слагаемые, содержащие переменную, в левой части, перенесем слагаемые, не содержащие переменную, в правую часть, изменив знак:

7х - 15х = 4 + 6
- 8х = 10
х = 10 : (- 8)
х = - 10/8
х = - 5/4
х = - 1 1/4
Ответ: - 1 1/4.

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