Question

3,5(-2x+1)-4(5−21x)=-12,5

Answer 1

Ответ:

Пошаговое объяснение:

3,5(-2х + 1) - 4(5 - 21х) = -12,5

-7х + 3,5 - 20 + 84х = -12,5

-7х + 84х = -12,5 - 3,5 + 20

77х = 4

х = 4/77

Answer 2

Ответ: х=19.25

Пошаговое объяснение: 3,5(-2x+1)-4(5−21x)=-12,5

-7х+3.5-20+84х=-12.5

77х-16.5=-12.5

77х=-12.5+16.5

77х=4

х=77:4

х=19.25

Answer 3

To solve the equation 3.5(-2x+1) - 4(5-21x) = -12.5, follow these steps:

1. Distribute the constants to the terms inside the parentheses: 3.5 * -2x + 3.5 * 1 - 4 * 5 + 4 * 21x = -12.5

2. Simplify each term: -7x + 3.5 - 20 + 84x = -12.5

3. Combine like terms: -7x + 84x - 16.5 = -12.5

4. Combine the x terms: 77x - 16.5 = -12.5

5. Add 16.5 to both sides to isolate the x term on one side: 77x = 4

6. Divide both sides by 77 to solve for x: x = 4 / 77

So, the solution to the equation is: x ≈ 0.0519