Question

7x -3(5x+2)=4 помогите пожалуйста​

Answer 1

Ответ:

Объяснение:

7x-15x-6=4

-8x-6=4

-8x=4+6

-8x=10

x=-5/4

Answer 2

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.

Answer 3

Solving the Equation 7x - 3(5x + 2) = 4

To solve the equation 7x - 3(5x + 2) = 4, we can follow these steps:

1. Expand the expression inside the parentheses. 2. Combine like terms. 3. Solve for x.

Step 1: Expand the Expression

Expanding the expression -3(5x + 2) gives us -15x - 6.

Step 2: Combine Like Terms

Substituting the expanded expression into the original equation gives us 7x - 15x - 6 = 4.

Combining like terms, we get -8x - 6 = 4.

Step 3: Solve for x

Adding 6 to both sides of the equation gives us -8x = 10.

Finally, dividing both sides by -8 gives us x = -5/4.

Therefore, the solution to the equation 7x - 3(5x + 2) = 4 is x = -5/4.

This solution is obtained by following the steps of expanding the expression, combining like terms, and solving for x.

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